G.f. A(x) satisfies: 5^n - 1 = Sum_{k=0..n} [x^k]A(x)^n and also satisfies: (5+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.
A100231
G.f. A(x) satisfies: 5^n - 1 = Sum_{k=0..n} [x^k]A(x)^n and also satisfies: (5+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) =3a(2) =4a(3) =-8a(4) =0a(5) =64a(6) =-192a(7) =-128a(8) =2816a(9) =-7680a(10) =-13312a(11) =157696a(12) =-352256a(13) =-1179648a(14) =9748480a(15) =-16220160a(16) =-99614720a(17) =630456320a(18) =-651427840a(19) =-8218214400a(20) =41481666560a(21) =-13191086080a(22) =-667334737920
External references
- oeis: A100231