G.f. A(x) satisfies: 1/(1 - x) = Sum_{n>=1} (-1)^(n-1) * A(x)^(n^2).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =11a(6) =25a(7) =64a(8) =168a(9) =434a(10) =1136a(11) =3046a(12) =8246a(13) =22400a(14) =61290a(15) =169036a(16) =468628a(17) =1304390a(18) =3646104a(19) =10232796a(20) =28814306a(21) =81376616a(22) =230462906a(23) =654363034a(24) =1862260359a(25) =5311064061a(26) =15176758091a(27) =43448083792a(28) =124593820615a(29) =357853635931