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%I #2 Mar 30 2012 18:59:44
%S 1,8,38,144,487,1552,4796,14592,44061,132568,398210,1195280,3586659,
%T 10760992,32284216,96854144,290564217,871694760,2615086750,7845263120,
%U 23535792671,70607381808
%N G.f. of the z^1 coefficients of the FP2 in the second column of the A156925 matrix
%F a(n)=6*a(n-1)-12*a(n-2)+10*a(n-3)-3*a(n-4)+2
%F a(n)=7*a(n-1)-18*a(n-2)+22*a(n-3)-13*a(n-4)+3*a(n-5)
%F a(n):= -1/6*n^3-n^2-7/3*n-9/4+9/4*3^n
%F G.f.: GF4(z;m=1) = z*(1+z)/((1-3*z)*(1-z)^4)
%Y Cf. A156933
%Y Equals second column of A156925
%Y Other columns A156935, A156936, A156937
%K easy,nonn
%O 1,2
%A _Johannes W. Meijer_, Feb 20 2009