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 A255548 #6 Feb 28 2015 14:48:48 %S A255548 1,3,2,6,5,10,4,15,7,21,9,28,11,36,16,45,14,55,8,66,22,78,20,91,29, %T A255548 105,12,120,27,136,37,153,46,171,35,190,56,210,13,231,44,253,67,276, %U A255548 17,300,54,325,79,351,92,378,65,406,23,435,18,465,77,496,19,528,106,561,90,595,121,630,137,666,104,703,154,741,172,780,119,820,191,861,26 %N A255548 Inverse permutation to A255547. %H A255548 Antti Karttunen, <a href="/A255548/b255548.txt">Table of n, a(n) for n = 1..217</a> %H A255548 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A255548 Inverse: A255547. %K A255548 nonn %O A255548 1,2 %A A255548 _Antti Karttunen_, Feb 25 2015