a(n) = (n^2 + (n+1)^2)*(n^2 + (n+1)^2 + 2*n*(n+1)).

Terms

a(0) =1a(1) =45a(2) =325a(3) =1225a(4) =3321a(5) =7381a(6) =14365a(7) =25425a(8) =41905a(9) =65341a(10) =97461a(11) =140185a(12) =195625a(13) =266085a(14) =354061a(15) =462241a(16) =593505a(17) =750925a(18) =937765a(19) =1157481a(20) =1413721a(21) =1710325a(22) =2051325a(23) =2440945a(24) =2883601a(25) =3383901a(26) =3946645a(27) =4576825a(28) =5279625