References to A181614

a(n) = number of steps needed to reach a Harshad number when the map k->A062028(l) is iterated starting at n, or -1 if a Harshad number is never reached.
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 25, 0, 24, 3, 1, 6, 23, 0, 2, 0, 0, 7, 5, 0, 22, 6, 0, 4, 1, 0, 3, 21

1 seqfan posts