A111401 f(f(n+1))-f(f(n)), where f() = Catalan() = A000108.

0, 1, 40, 2674398, 39044429911904441284800, 10934377152170553993439479038404269881062854488806451946716107868799042109068

Offset

0,3

Links

Table of n, a(n) for n=0..5.

Crossrefs

Sequence in context: A300842 A159428 A115482 * A116101 A167265 A214337

Adjacent sequences: A111398 A111399 A111400 * A111402 A111403 A111404

Keyword

nonn

Author

N. J. A. Sloane, Nov 12 2005

Status

approved