Expansion of (g/(1 + x*g^2))^2, where g = 1+x*g^4 is the g.f. of A002293.
A391608
Expansion of (g/(1 + x*g^2))^2, where g = 1+x*g^4 is the g.f. of A002293.
Terms
- a(0) =1a(1) =0a(2) =4a(3) =22a(4) =150a(5) =1076a(6) =8063a(7) =62358a(8) =494081a(9) =3990220a(10) =32726676a(11) =271856860a(12) =2282553289a(13) =19339768464a(14) =165151550460
External references
- oeis: A391608