cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A004096 Catalan numbers written backwards.

This page as a plain text file.
%I A004096 #22 Sep 08 2022 08:44:32
%S A004096 1,1,2,5,41,24,231,924,341,2684,69761,68785,210802,9247,444762,
%T A004096 5484969,7675353,97446921,7836774,913627671,240214656,2076266442,
%U A004096 4636528419,56316950343,4237414099821,2541046491684,25127035376381,40061905533596,63057159747362
%N A004096 Catalan numbers written backwards.
%H A004096 Alois P. Heinz, <a href="/A004096/b004096.txt">Table of n, a(n) for n = 0..1000</a>
%F A004096 a(n) = A004086(A000108(n)). - _Michel Marcus_, Apr 05 2014
%p A004096 a:= n-> (s-> parse(cat(s[-i]$i=1..length(s))))(
%p A004096          ""||(binomial(2*n, n)/(n+1))):
%p A004096 seq(a(n), n=0..50);  # _Alois P. Heinz_, Apr 09 2015
%t A004096 FromDigits[Reverse[IntegerDigits[#]]]&/@CatalanNumber[Range[0, 40]] (* _Vincenzo Librandi_, Jan 21 2016 *)
%o A004096 (Magma) [Seqint(Reverse(Intseq(Catalan(n)))): n in [0..40]]; // _Vincenzo Librandi_, Jan 21 2016
%Y A004096 Cf. A000108.
%K A004096 nonn,base
%O A004096 0,3
%A A004096 _N. J. A. Sloane_
%E A004096 More terms from _Eric M. Schmidt_, Apr 04 2014