Number of ways of writing n^2 as a sum of seven squares.

Terms

a(0) =1a(1) =14a(2) =574a(3) =3542a(4) =18494a(5) =43414a(6) =145222a(7) =235998a(8) =591934a(9) =860846a(10) =1779974a(11) =2256422a(12) =4678982a(13) =5195750a(14) =9675918a(15) =10983742a(16) =18942014a(17) =19873966a(18) =35294686a(19) =34670454a(20) =57349894a(21) =59707494a(22) =92513302a(23) =90116222a(24) =149759302a(25) =135668414a(26) =213025750a(27) =209185718a(28) =311753358a(29) =287144326