Expansion of 1/(g^2 * (2 - g^2)), where g = 1+x*g^2 is the g.f. of A000108.

A391513

Expansion of 1/(g^2 * (2 - g^2)), where g = 1+x*g^2 is the g.f. of A000108.

Terms

    a(0) =1a(1) =0a(2) =4a(3) =20a(4) =97a(5) =468a(6) =2256a(7) =10876a(8) =52447a(9) =252984a(10) =1220580a(11) =5890044a(12) =28427026a(13) =137211432a(14) =662344528a(15) =3197451224a(16) =15436322843a(17) =74524477168a(18) =359803660284

External references