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.
%I A130954 #7 Jul 29 2022 22:01:31 %S A130954 0,1,3,2,7,6,8,4,5,17,18,16,15,14,20,19,22,9,13,21,10,11,12,45,46,48, %T A130954 49,50,44,47,43,40,39,42,41,37,38,54,55,53,52,51,61,60,63,23,27,62,36, %U A130954 34,33,57,56,64,24,35,59,26,29,30,58,25,28,32,31,129,130,132,133,134 %N A130954 Signature permutation of a Catalan automorphism: row 18 of A130403. %H A130954 A. Karttunen, <a href="/A130954/b130954.txt">Table of n, a(n) for n = 0..2055</a> %H A130954 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130954 Inverse: A130953. %Y A130954 Cf. A130403. %K A130954 nonn %O A130954 0,3 %A A130954 _Antti Karttunen_, Jun 11 2007