OFFSET
1,2
COMMENTS
Numbers n such that A230103(n) = 1.
LINKS
PROG
(Python)
from math import prod
from collections import Counter
def b(n): return n + prod(map(int, str(n)))
def aupto(n):
c = Counter(b(m) for m in range(n+1))
return [k for k in range(n+1) if c[k] == 1]
print(aupto(185)) # Michael S. Branicky, Jan 09 2023
CROSSREFS
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Oct 13 2013
STATUS
approved