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 A255547 #9 Feb 28 2015 14:48:41 %S A255547 1,3,2,7,5,4,9,19,11,6,13,27,39,17,8,15,45,57,61,23,10,21,55,97,91,81, %T A255547 29,12,25,85,117,147,121,103,35,14,31,109,177,181,199,153,123,41,16, %U A255547 33,139,225,277,243,253,183,145,47,18,37,157,295,345,369,315,301,217,165,53,20,43,175,325,447,465,471,379,351,247,187,59,22 %N A255547 Lucky / Unlucky array, transposed. %C A255547 See comments at A255545. %H A255547 Antti Karttunen, <a href="/A255547/b255547.txt">Table of n, a(n) for n = 1..5995; the first 109 antidiagonals of the array, flattened</a> %H A255547 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A255547 (Scheme) (define (A255547 n) (A255545bi (A004736 n) (A002260 n))) ;; Other code as in A255545 and A255543. %Y A255547 Transpose: A255545. %Y A255547 Inverse: A255548. %Y A255547 Topmost row: A000959, under which follows the rows of array A255544. %K A255547 nonn,tabl %O A255547 1,2 %A A255547 _Antti Karttunen_, Feb 25 2015