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%I #6 Jun 02 2020 01:20:34
%S 1,4,12,29,61,120,222,392,669,1109,1792,2838,4413,6751,10184,15169,
%T 22332,32538,46955,67162,95288,134173,187593,260562,359682,493622,
%U 673736,914814,1236057,1662340,2225738,2967500,3940540,5212495,6869598
%N Column 2 of triangle A128562.
%F a(n) is the coefficient of q^(2*n+6) in the q-binomial coefficient [2*n+5, n+2].
%o (PARI) a(n)=polcoeff(prod(j=n+3,2*n+5,1-q^j)/prod(j=1,n+3,1-q^j),2*n+6,q)
%K nonn
%O 0,2
%A _Paul D. Hanna_, Mar 10 2007
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