0,2

a(n)= A008488(n+1)-2 = 4-15*A000292(n+1)+6*A000332(n+4)+20*A000217(n+1)-15*(n+1) = 5*a(n-1)-10*a(n-2)+10*a(n-3)-5*a(n-4)+a(n-5). G.f.: -x*(1+x)*(4*x^2-5*x+4)/(x-1)^5.

seq(n^2*(n^2+15)/4, n=0..80)

Sequence in context: A067981 A162254 A138617 this_sequence A166808 A122684 A122681

Adjacent sequences: A159830 A159831 A159832 this_sequence A159834 A159835 A159836

easy,nonn

R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 23 2009