A349279 Fixed points of A349278.

1, 2, 3, 4, 5, 6, 7, 8, 9, 24, 45, 8643024

Offset: 1

Author

Michel Marcus, Nov 13 2021

Keywords

• nonn
• base
• more

Comments

This is similar to A349190 but with digits taken in reversed order.

If it exists, a(13) > 10^18. - Max Alekseyev, Jan 19 2025

Examples

			24 is a term because A349278(24) = 4*(4+2) = 4*6 = 24.
		

Crossrefs

Cf. A349190, A349278.

Programs

Mathematica

f[n_] := Times @@ Accumulate @ Reverse @ IntegerDigits[n]; Select[Range[100], f[#] == # &] (* Amiram Eldar, Nov 13 2021 *)

Python

from math import prod
from itertools import accumulate
def ok(n):
  return n == (0 if n%10==0 else prod(accumulate(map(int, str(n)[::-1]))))
print([k for k in range(1, 10**7) if ok(k)]) # Michael S. Branicky, Nov 13 2021