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Number of partitions of n with four parts in which no part occurs more than twice.
2

%I #6 Oct 16 2018 16:35:07

%S 1,1,3,4,6,8,12,14,19,23,29,34,42,48,58,66,77,87,101,112,128,142,160,

%T 176,197,215,239,260,286,310,340,366,399,429,465,498,538,574,618,658,

%U 705,749,801,848,904,956,1016,1072,1137,1197,1267,1332,1406,1476,1556

%N Number of partitions of n with four parts in which no part occurs more than twice.

%H Alois P. Heinz, <a href="/A320592/b320592.txt">Table of n, a(n) for n = 6..10000</a>

%F G.f.: -(x^4-x^2-1)*x^6/((x^2+1)*(x^2+x+1)*(x+1)^2*(x-1)^4).

%Y Column k=4 of A209318.

%K nonn,easy

%O 6,3

%A _Alois P. Heinz_, Oct 16 2018