A139176 - OEIS

%I #13 Sep 08 2022 08:45:33

%S 0,3,19,119,839,6719,60479,604799,6652799,79833599,1037836799,

%T 14529715199,217945727999,3487131647999,59281238015999,

%U 1067062284287999,20274183401471999,405483668029439999

%N a(n) = (n! - 6)/6.

%C Original name: Natural numbers of the form (n!-6)/6.

%H Vincenzo Librandi, <a href="/A139176/b139176.txt">Table of n, a(n) for n = 3..300</a>

%p seq((factorial(n)-6)/6,n=3..25); # _Muniru A Asiru_, Oct 20 2018

%t Table[(n! - 6)/6, {n, 3, 20}]

%o (Magma) [(Factorial(n)-6)/6: n in [3..25]]; // _Vincenzo Librandi_, Jul 20 2011

%o (GAP) List([3..25],n->(Factorial(n)-6)/6); # _Muniru A Asiru_, Oct 20 2018

%Y Cf. A033312, A139172, A139173, A139174, A139175, A139176, A139177, A139183, A139184.

%K nonn

%O 3,2

%A _Artur Jasinski_, Apr 11 2008

%E New name from _Jon E. Schoenfield_, Oct 19 2018