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 A130947 #7 Aug 19 2022 12:23:53 %S A130947 0,1,2,3,6,4,5,7,8,14,16,19,9,10,15,11,12,20,17,13,18,21,22,42,37,38, %T A130947 53,44,51,47,56,25,23,60,24,26,27,39,43,52,28,29,40,30,31,57,61,32,54, %U A130947 45,46,41,33,34,55,48,35,49,62,58,36,50,59,63,64,121,154,126,109,107 %N A130947 Signature permutation of a Catalan automorphism: row 9 of A130402. %H A130947 A. Karttunen, <a href="/A130947/b130947.txt">Table of n, a(n) for n = 0..2055</a> %H A130947 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130947 Cf. A130402. %Y A130947 Inverse: A130948. %K A130947 nonn %O A130947 0,3 %A A130947 _Antti Karttunen_, Jun 11 2007