Expansion of 1/(1 - 3*x*C(x)), where C(x) = (1 - sqrt(1 - 4*x))/(2*x) = g.f. for the Catalan numbers A000108.
A007854
Expansion of 1/(1 - 3*x*C(x)), where C(x) = (1 - sqrt(1 - 4*x))/(2*x) = g.f. for the Catalan numbers A000108.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =51a(4) =222a(5) =978a(6) =4338a(7) =19323a(8) =86310a(9) =386250a(10) =1730832a(11) =7763550a(12) =34847796a(13) =156503064a(14) =703149438a(15) =3160160811a(16) =14206181382a(17) =63874779714a(18) =287242041528
External references
- oeis: A007854