12-dimensional square numbers.

Terms

a(0) =1a(1) =14a(2) =104a(3) =546a(4) =2275a(5) =8008a(6) =24752a(7) =68952a(8) =176358a(9) =419900a(10) =940576a(11) =1998724a(12) =4056234a(13) =7904456a(14) =14858000a(15) =27041560a(16) =47805615a(17) =82317690a(18) =138389160a(19) =227613750a(20) =366913365a(21) =580610160a(22) =903171360a(23) =1382805840a(24) =2086129500a(25) =3104160696a(26) =4559958144a(27) =6618272584