Ansible dynamically generate ipam + inventory names based on single integer

play.yml

---
- name: Auto create dictionary
  hosts: [localhost]
  connection: local
  vars:
    ansible_tower:
      towers_amount:        3              # Make sure this is uneven
      databases_amount:     1              # Make sure this is uneven
    prefix: 172.17.202.64/26
  tasks:
    - name: Add towers to atw_hosts dictionary
      set_fact: 
        atw_hosts: "{{ atw_hosts|default([])+[{'ip': (prefix | ipaddr(item + 16) | ipaddr('address')), 'name': 'tower-' + (item | string), 'type':'tower'}]  }}"
        # key_value3: "{{ key_value3|default({}) |  {'x': item}  }}"
      loop: "{{ range(1, ansible_tower.towers_amount+1)|list }}"
    - name: Add databases to atw_hosts dictionary
      set_fact: 
        atw_hosts: "{{ atw_hosts|default([])+[{'ip': (prefix | ipaddr(item + 5) | ipaddr('address')), 'name': 'database-' + (item | string), 'type':'database'}]  }}"
        # key_value3: "{{ key_value3|default({}) |  {'x': item}  }}"
      loop: "{{ range(1, ansible_tower.databases_amount+1)|list }}"
    - debug:
        var: atw_hosts
...

result.txt

PLAY [Auto create dictionary] ***************************************************************************************************************************************************************************
TASK [Gathering Facts] **********************************************************************************************************************************************************************************
ok: [localhost]

TASK [Add towers to atw_hosts dictionary] ***************************************************************************************************************************************************************
ok: [localhost] => (item=1)
ok: [localhost] => (item=2)
ok: [localhost] => (item=3)

TASK [Add databases to atw_hosts dictionary] ************************************************************************************************************************************************************
ok: [localhost] => (item=1)

TASK [debug] ********************************************************************************************************************************************************************************************
ok: [localhost] => {
    "atw_hosts": [
        {
            "ip": "172.17.202.81",
            "name": "tower-1",
            "type": "tower"
        },
        {
            "ip": "172.17.202.82",
            "name": "tower-2",
            "type": "tower"
        },
        {
            "ip": "172.17.202.83",
            "name": "tower-3",
            "type": "tower"
        },
        {
            "ip": "172.17.202.70",
            "name": "database-1",
            "type": "database"
        }
    ]
}

PLAY RECAP **********************************************************************************************************************************************************************************************
localhost                  : ok=4    changed=0    unreachable=0    failed=0