login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Number of n-member subsets of [4*n] whose elements sum to a multiple of four.
2

%I #4 Aug 29 2018 17:48:38

%S 1,1,6,55,460,3876,33594,296010,2630044,23535820,211911256,1917334783,

%T 17417167156,158753389900,1451182694940,13298522298180,

%U 122131736900380,1123787895356412,10358022417860040,95615237915961100,883829035764950960,8179808679272664720

%N Number of n-member subsets of [4*n] whose elements sum to a multiple of four.

%H Alois P. Heinz, <a href="/A318592/b318592.txt">Table of n, a(n) for n = 0..1000</a>

%e a(2) = 6: {1,3}, {1,7}, {2,6}, {3,5}, {4,8}, {5,7}.

%Y Column k=4 of A318557.

%K nonn

%O 0,3

%A _Alois P. Heinz_, Aug 29 2018