RTO-Number.js

gistfile1.txt

const letters = {
  'A': 1,
  'T': 4,
  'M': 4,
  'N': 5,
}
// tn = 9, 42 = 6, am = 5
// tn42am = 2

const ns0 = [1,3,5,6,9,10,14,15,16,18,21,24,27,32,33,36,42,46,50,51]
const ns1 = [19,23,37,41,45]
const ns2 = [20,52,55]

function reduce(numStr) {
  const n = numStr.split('').reduce((acc,c) => acc += Number(letters[c] || c), 0)
  return n < 58 ? n : reduce(n.toString())
}

let n = 3900, k = [], j = [], l = [];
while(n <= 4900) {
  const str = 'TN42AM' + n
  const r = reduce(str)
  ns1.includes(r) && k.push([str, r, 'ns1'].join('-'));
  ns0.includes(r) && j.push([str, r, 'ns0'].join('-'));
  ns2.includes(r) && l.push([str, r, 'ns2'].join('-'));
  n++;
}

console.log(k, j, l)