G.f.: Sum_{n>=0} x^n / ( (1+x)^(n+1) * (1 - 4*(n+1)*x) ).
A245375
G.f.: Sum_{n>=0} x^n / ( (1+x)^(n+1) * (1 - 4*(n+1)*x) ).
Terms
- a(0) =1a(1) =4a(2) =20a(3) =112a(4) =736a(5) =5632a(6) =49024a(7) =474112a(8) =5017600a(9) =57597952a(10) =712597504a(11) =9446981632a(12) =133474877440
External references
- oeis: A245375