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 A130991 #8 Aug 19 2022 12:53:32 %S A130991 0,1,2,3,4,5,8,7,6,9,10,11,12,13,21,22,20,17,18,19,15,14,16,23,24,27, %T A130991 26,25,28,29,30,31,32,33,36,35,34,58,59,64,63,62,57,61,54,45,46,55,48, %U A130991 49,50,56,60,52,40,39,51,41,37,38,53,43,47,44,42,65,66,67,68,69,77,78 %N A130991 Signature permutation of a Catalan automorphism: row 10 of A122288. %C A130991 Derived from automorphism *A130351 with recursion scheme KROF. %H A130991 A. Karttunen, <a href="/A130991/b130991.txt">Table of n, a(n) for n = 0..2055</a> %H A130991 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130991 Cf. A122288, A130351. %Y A130991 Inverse: A130992. %K A130991 nonn %O A130991 0,3 %A A130991 _Antti Karttunen_, Jun 20 2007