Expansion of g^2/(1 - x^3*g), where g = 1+x*g^3 is the g.f. of A001764.
A391123
Expansion of g^2/(1 - x^3*g), where g = 1+x*g^3 is the g.f. of A001764.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =31a(4) =146a(5) =740a(6) =3932a(7) =21595a(8) =121621a(9) =698531a(10) =4075738a(11) =24090628a(12) =143943104a(13) =868008178a(14) =5275779056a(15) =32287126534a(16) =198785908710
External references
- oeis: A391123