Number of sum of squares representations of n^2 in n dimensions disregarding order and sign.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =4a(6) =9a(7) =13a(8) =25a(9) =52a(10) =94a(11) =195a(12) =354a(13) =691a(14) =1341a(15) =2514a(16) =4746a(17) =8984a(18) =16639a(19) =31031a(20) =57421a(21) =105091a(22) =192266a(23) =349765a(24) =632223a(25) =1138114a(26) =2043082a(27) =3642712a(28) =6474196a(29) =11462149