G.f. satisfies A(x) = A(x^4 + 4*x*A(x)^4) / A(x^3 + 3*x*A(x)^3).
A384270
G.f. satisfies A(x) = A(x^4 + 4*x*A(x)^4) / A(x^3 + 3*x*A(x)^3).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =21a(4) =130a(5) =888a(6) =6408a(7) =48063a(8) =371020a(9) =2927770a(10) =23510106a(11) =191487656a(12) =1578141446a(13) =13136158810a(14) =110276181794a(15) =932581374945
External references
- oeis: A384270