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

Terms

a(0) =0a(1) =0a(2) =6a(3) =42a(4) =156a(5) =420a(6) =930a(7) =1806a(8) =3192a(9) =5256a(10) =8190a(11) =12210a(12) =17556a(13) =24492a(14) =33306a(15) =44310a(16) =57840a(17) =74256a(18) =93942a(19) =117306a(20) =144780a(21) =176820a(22) =213906a(23) =256542a(24) =305256a(25) =360600a(26) =423150a(27) =493506a(28) =572292a(29) =660156