G.f.: 1 = Sum_{n>=0} a(n) * x^n * (1 - (2*n+1)*x)^2.
A222080
G.f.: 1 = Sum_{n>=0} a(n) * x^n * (1 - (2*n+1)*x)^2.
Terms
- a(0) =1a(1) =2a(2) =11a(3) =92a(4) =1013a(5) =13726a(6) =219919a(7) =4057048a(8) =84545129a(9) =1961698586a(10) =50111003987
External references
- oeis: A222080