Partial sums of A303981.

Terms

a(0) =1a(1) =9a(2) =25a(3) =57a(4) =89a(5) =129a(6) =177a(7) =249a(8) =313a(9) =409a(10) =489a(11) =593a(12) =705a(13) =817a(14) =945a(15) =1097a(16) =1257a(17) =1401a(18) =1561a(19) =1729a(20) =1921a(21) =2137a(22) =2313a(23) =2521a(24) =2745a(25) =2977a(26) =3233a(27) =3473a(28) =3745a(29) =4009