Number to XLSX Column Converter

utils.js

const APLHA_MOD = 26;
const nt = (n = 0) => ((n % APLHA_MOD) + 10).toString(APLHA_MOD + 10);

const ct = (n = 0, acc = "") => {
  if (n - APLHA_MOD > 0) {
    return ct(n - APLHA_MOD, acc + nt(APLHA_MOD));
  }

  return acc + nt(n);
};

// 1 = A, 2 = B, 26 = Z, 27 = AA, 28 = AB, 52 = AZ
console.clear();
console.log(
  Array(72)
    .fill(0)
    .map((x, i) => ct(i))
);