Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #12 Feb 08 2017 19:09:11
%S 1,7,49,231,1029,3843,13573,43219,131131,370909,1007083,2596573,
%T 6466159,15465961,35906959,80682553,176682268,376497604,784435036,
%U 1596836164,3186750028,6232957588,11978020684,22615355476,42031123204,76900938268
%N a(n) has generating function 1/((1-x)^k*(1-x^2)^(k*(k-1)/2)) for k=7.
%H Alois P. Heinz, <a href="/A181479/b181479.txt">Table of n, a(n) for n = 0..1000</a>
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Schur_polynomial">Schur Polynomial</a>
%t CoefficientList[Series[1/(1-x)^7/(1-x^2)^21,{x,0,16}],x]; see also A181477.
%Y Column k=7 of A210391. - _Alois P. Heinz_, Mar 22 2012
%K nonn,easy
%O 0,2
%A _Wouter Meeussen_, Oct 24 2010