G.f. A(x) satisfies: 1/(1-x) = Sum_{n>=0} x^n * (1+x)^(n*(n-1)/2) / A(x)^(n*(n+1)/2).
A325579
G.f. A(x) satisfies: 1/(1-x) = Sum_{n>=0} x^n * (1+x)^(n*(n-1)/2) / A(x)^(n*(n+1)/2).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =1a(6) =3a(7) =10a(8) =31a(9) =121a(10) =464a(11) =1944a(12) =8454a(13) =38468a(14) =182126a(15) =893488a(16) =4535670a(17) =23760888a(18) =128267430a(19) =712403572a(20) =4065752904a(21) =23816376636a(22) =143051516760a(23) =880239634009
External references
- oeis: A325579