A004096 Catalan numbers written backwards.

1, 1, 2, 5, 41, 24, 231, 924, 341, 2684, 69761, 68785, 210802, 9247, 444762, 5484969, 7675353, 97446921, 7836774, 913627671, 240214656, 2076266442, 4636528419, 56316950343, 4237414099821, 2541046491684, 25127035376381, 40061905533596, 63057159747362

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• base

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..1000

Crossrefs

Cf. A000108.

Programs

Magma

[Seqint(Reverse(Intseq(Catalan(n)))): n in [0..40]]; // Vincenzo Librandi, Jan 21 2016

Maple

a:= n-> (s-> parse(cat(s[-i]$i=1..length(s))))(
         ""||(binomial(2*n, n)/(n+1))):
seq(a(n), n=0..50);  # Alois P. Heinz, Apr 09 2015

Mathematica

FromDigits[Reverse[IntegerDigits[#]]]&/@CatalanNumber[Range[0, 40]] (* Vincenzo Librandi, Jan 21 2016 *)

Formula

a(n) = A004086(A000108(n)). - Michel Marcus, Apr 05 2014

Extensions

More terms from Eric M. Schmidt, Apr 04 2014