A178614 a(n) = prime(n)!/(n+1)!.

1, 1, 5, 42, 55440, 1235520, 8821612800, 335221286400, 7124122778572800, 221504779785446277120000, 17166620433372086476800000, 2210327142511928825790332928000000

Offset

1,3

Links

G. C. Greubel, Table of n, a(n) for n = 1..75

Formula

a(n) = A039716(n)/A000142(n+2) = A177946(n)/(n+1).

Mathematica

Table[(Prime[n])!/(n+1)!, {n, 1, 15}] (* G. C. Greubel, Jan 29 2019 *)

Prog

(PARI) vector(15, n, (prime(n))!/(n+1)!) \\ G. C. Greubel, Jan 29 2019
(Magma) [Factorial(NthPrime(n))/Factorial(n+1): n in [1..15]]; // G. C. Greubel, Jan 29 2019
(Sage) [factorial(nth_prime(n))/factorial(n+1) for n in (1..15)] # G. C. Greubel, Jan 29 2019

Crossrefs

Sequence in context: A350930 A368352 A132487 * A360942 A284170 A067927

Adjacent sequences: A178611 A178612 A178613 * A178615 A178616 A178617

Keyword

nonn

Author

Juri-Stepan Gerasimov, Jun 05 2010

Extensions

a(7) and a(9) corrected by R. J. Mathar, Jun 07 2010

Status

approved