My sublime text settings Command "prompt_insert_nums" is available through sublime package Insert Sequences

User-Default (Linux).sublime-keymap

[
    { "keys": ["ctrl+alt+up"], "command": "select_lines", "args": {"forward": false} },
    { "keys": ["ctrl+alt+down"], "command": "select_lines", "args": {"forward": true} },
    { "keys": ["ctrl+q"], "command": "close" },
    { "keys": ["ctrl+w"], "command": "find_under_expand" },
    { "keys": ["ctrl+r"], "command": "wrap" },
    { "keys": ["ctrl+alt+n"], "command": "prompt_insert_nums" }
]

User-Preferences.sublime-settings

{
    "detect_indentation": false,
    "rulers": [78],
    "font_size": 12,
    "ensure_newline_at_eof_on_save": true,
    "fallback_encoding": "Cyrillic (Windows 1251)",
    "translate_tabs_to_spaces": true
}