G.f. A(x) satisfies: A(x) = 1 + x * (A(x) + 4*x*A'(x)) / (A(x) + x*A'(x)).
A302101
G.f. A(x) satisfies: A(x) = 1 + x * (A(x) + 4*x*A'(x)) / (A(x) + x*A'(x)).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =12a(4) =57a(5) =318a(6) =2190a(7) =20298a(8) =265557a(9) =4683954a(10) =102511182a(11) =2622117720a(12) =75857421522
External references
- oeis: A302101