Expansion of g^2/(2 - g), where g = 1+x*g^3 is the g.f. of A001764.

A391125

Expansion of g^2/(2 - g), where g = 1+x*g^3 is the g.f. of A001764.

Terms

    a(0) =1a(1) =3a(2) =13a(3) =64a(4) =337a(5) =1851a(6) =10468a(7) =60488a(8) =355369a(9) =2115577a(10) =12731141a(11) =77306428a(12) =473018396a(13) =2913321828a(14) =18045744424a(15) =112340143632a(16) =702457703961

External references