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%I #11 Oct 14 2024 01:38:24
%S 2,5,21,121,841,6721,60481,604801,6652801,79833601,1037836801,
%T 14529715201,217945728001,3487131648001,59281238016001,
%U 1067062284288001,20274183401472001,405483668029440001,8515157028618240001
%N a(n) = (n!+6)/6.
%H Amiram Eldar, <a href="/A139153/b139153.txt">Table of n, a(n) for n = 3..450</a>
%t Table[(n! + 6)/6, {n, 3, 30}]
%Y Cf. A007749, A020458, A082672, A089085, A089130, A117141, A139056-A139066, A139068, A137390, A139070-A139075, A139148-A139157, A139159, A139160, A139161, A139162.
%K nonn
%O 3,1
%A _Artur Jasinski_, Apr 11 2008
%E Name corrected by _Amiram Eldar_, Oct 14 2024