G.f. satisfies: A(x) = (1+x*A(x)^3)*(1+x^2*A(x)^2)*(1+x^3*A(x)).
A211855
G.f. satisfies: A(x) = (1+x*A(x)^3)*(1+x^2*A(x)^2)*(1+x^3*A(x)).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =19a(4) =98a(5) =553a(6) =3288a(7) =20287a(8) =128681a(9) =833889a(10) =5496837a(11) =36742204a(12) =248454438a(13) =1696588460a(14) =11682677436a(15) =81031854579a(16) =565614332353
External references
- oeis: A211855