Expansion of g^2/(1 + x^4*g^4), where g = 1+x*g^3 is the g.f. of A001764.
A391303
Expansion of g^2/(1 + x^4*g^4), where g = 1+x*g^3 is the g.f. of A001764.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =30a(4) =142a(5) =722a(6) =3843a(7) =21136a(8) =119156a(9) =684886a(10) =3998441a(11) =23644650a(12) =141331431a(13) =852524958a(14) =5183033965a(15) =31726664930a(16) =195373188850
External references
- oeis: A391303