G.f. A(x) satisfies: 2^n - 1 = Sum_{k=0..n} [x^k]A(x)^n and also satisfies: (2+z)^n - (1+z)^n + z^n = Sum_{k=0..n} [x^k](A(x)+z*x)^n for all z, where [x^k]A(x)^n denotes the coefficient of x^k in A(x)^n.
A100223
G.f. A(x) satisfies: 2^n - 1 = Sum_{k=0..n} [x^k]A(x)^n and also satisfies: (2+z)^n - (1+z)^n + z^n = Sum_{k=0..n} [x^k](A(x)+z*x)^n for all z, where [x^k]A(x)^n denotes the coefficient of x^k in A(x)^n.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =0a(5) =-2a(6) =-3a(7) =1a(8) =11a(9) =15a(10) =-13a(11) =-77a(12) =-86a(13) =144a(14) =595a(15) =495a(16) =-1520a(17) =-4810a(18) =-2485a(19) =15675a(20) =39560a(21) =6290a(22) =-159105a(23) =-324805a(24) =87075a(25) =1592843a(26) =2616757a(27) =-2136539a(28) =-15726114a(29) =-20247800
External references
- oeis: A100223