Expansion of g^2/(1 + x^2*g^3), where g = 1+x*g^4 is the g.f. of A002293.
A391457
Expansion of g^2/(1 + x^2*g^3), where g = 1+x*g^4 is the g.f. of A002293.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =47a(4) =311a(5) =2202a(6) =16344a(7) =125539a(8) =989556a(9) =7959527a(10) =65070957a(11) =539105359a(12) =4516404177a(13) =38195177357a(14) =325642377147
External references
- oeis: A391457