G.f. satisfies A(x) = x*(1+4A+A^2)^2/(1+A+A^2).
A101487
G.f. satisfies A(x) = x*(1+4A+A^2)^2/(1+A+A^2).
Terms
- a(0) =0a(1) =1a(2) =7a(3) =59a(4) =544a(5) =5289a(6) =53256a(7) =549771a(8) =5782105a(9) =61698314a(10) =666014200a(11) =7257758425a(12) =79716116408a(13) =881431795012
External references
- oeis: A101487