a(n) = 2*n^4 + 2*n^3 + 3*n^2 + 2*n + 1.

Terms

a(0) =1a(1) =10a(2) =65a(3) =250a(4) =697a(5) =1586a(6) =3145a(7) =5650a(8) =9425a(9) =14842a(10) =22321a(11) =32330a(12) =45385a(13) =62050a(14) =82937a(15) =108706a(16) =140065a(17) =177770a(18) =222625a(19) =275482a(20) =337241a(21) =408850a(22) =491305a(23) =585650a(24) =692977a(25) =814426a(26) =951185a(27) =1104490a(28) =1275625a(29) =1465922