18579456
domain: N
Appears in sequences
- a(n) = product of nonzero digits of n! (A000142).at n=16A067067
- E.g.f. satisfies: A(x,y) = exp(x*y*exp(x*A(x,y))).at n=51A161552
- Omit the trailing zeros from double factorial of even numbers (A000165).at n=9A375489
- a(n) is the product of first n even numbers not divisible by 5 (cf. A217562).at n=8A383227