G.f.: A(x) satisfies 1 = Sum_{n>=0} Product_{k=2*n..3*n-1} ( (1+x)^k - A(x) ).
A338181
G.f.: A(x) satisfies 1 = Sum_{n>=0} Product_{k=2*n..3*n-1} ( (1+x)^k - A(x) ).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =123a(4) =3434a(5) =127389a(6) =5800285a(7) =310671959a(8) =19065484061
External references
- oeis: A338181