A071550 a(n) = (8n)!/n!^8.

1, 40320, 81729648000, 369398958888960000, 2390461829733887910000000, 18975581770994682860770223800320, 171889289584866507880743491472699801600, 1707750599894443404262670865631874246246400000, 18165723931630806756964027928179555634194028454000000

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..100

Formula

a(n) ~ 4^(12*n-1) / (Pi*n)^(7/2). - Amiram Eldar, Oct 17 2025

Mathematica

Table[(8 n)!/(n)!^8, {n, 0, 20}] (* Vincenzo Librandi, Aug 13 2014 *)

Prog

(Magma) [Factorial(8*n)/Factorial(n)^8: n in [0..20]]; // Vincenzo Librandi, Aug 13 2014

Crossrefs

Sequences (k*n)!/n!^k: A000984 (k = 2), A006480 (k = 3), A008977 (k = 4), A008978 (k = 5), A008979 (k = 6), A071549 (k = 7), A071551 (k = 9), A071552 (k = 10).

Sequence in context: A227670 A172541 A287084 * A181724 A072269 A259113

Adjacent sequences: A071547 A071548 A071549 * A071551 A071552 A071553

Keyword

nonn,easy

Author

Benoit Cloitre, May 30 2002

Status

approved