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 A154442 #6 Mar 31 2012 13:21:17 %S A154442 0,1,3,2,6,7,4,5,12,13,15,14,8,9,10,11,24,25,26,27,30,31,28,29,16,17, %T A154442 18,19,20,21,22,23,48,49,50,51,52,53,54,55,60,61,63,62,56,57,58,59,32, %U A154442 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,96,97,98,99,100,101,102 %N A154442 Permutation of nonnegative integers: the inverse of A154441. %H A154442 A. Karttunen, <a href="/A154442/b154442.txt">Table of n, a(n) for n = 0..2047</a> %H A154442 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A154442 Inverse: A154441. a(n) = A153141(A154444(n)) = A054429(A154446(A054429(n))). Cf. A072376, A153141-A153142, A154435-A154436, A154439-A154448. Corresponds to A154452 in the group of Catalan bijections. %K A154442 nonn,base %O A154442 0,3 %A A154442 _Antti Karttunen_, Jan 17 2009 %E A154442 Spelling/notation corrections by _Charles R Greathouse IV_, Mar 18 2010