A181577 Prime number of trailing end 0's associated with p! where p = A181576(n).

2, 2, 3, 3, 7, 13, 19, 31, 37, 41, 43, 47, 47, 53, 71, 89, 97, 103, 107, 109, 113, 113, 137, 139, 149, 151, 151, 157, 163, 181, 191, 197, 211, 227, 233, 239, 251, 257, 263, 263, 269, 271, 277, 293, 313, 347, 353, 359, 383, 389, 401, 421, 421, 433, 443, 463, 499

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Formula

a(n) = A027868(A181576(n)). - Amiram Eldar, May 03 2024

Mathematica

Select[ IntegerExponent[ #! ] & /@ Prime@ Range@ 310, PrimeQ] (* Robert G. Wilson v, Nov 06 2010 *)

Prog

(PARI) lista(pmax) = {my(tz); forprime(p = 1, pmax, tz = (p - sumdigits(p, 5))/4; if(isprime(tz), print1(tz, ", "))); } \\ Amiram Eldar, May 03 2024

Crossrefs

Cf. A027868, A181575, A181576.

Sequence in context: A331729 A095741 A252582 * A110880 A195952 A236545

Adjacent sequences: A181574 A181575 A181576 * A181578 A181579 A181580

Keyword

base,nonn

Author

Lekraj Beedassy, Nov 02 2010

Extensions

More terms from Robert G. Wilson v, Nov 06 2010

Status

approved