A349279 Fixed points of A349278.

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

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..12.

Example

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

Mathematica

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

Prog

(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

Crossrefs

Cf. A349190, A349278.

Sequence in context: A134703 A061862 A007532 * A347189 A068189 A069716

Adjacent sequences: A349276 A349277 A349278 * A349280 A349281 A349282

Keyword

nonn,base,more

Author

Michel Marcus, Nov 13 2021

Status

approved