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 A278503 #6 Nov 24 2016 09:28:00 %S A278503 1,3,2,7,5,4,13,9,11,6,19,15,21,17,8,27,25,37,33,23,10,39,31,51,55,45, %T A278503 29,12,49,43,73,85,75,57,35,14,63,61,99,121,111,97,69,41,16,79,67,127, %U A278503 151,159,145,115,81,47,18,91,87,163,193,211,199,171,135,93,53,20,109,103,187,247,271,267,243,205,157,105,59,22 %N A278503 Transpose of square array A278505. %C A278503 See A278505. %H A278503 Antti Karttunen, <a href="/A278503/b278503.txt">Table of n, a(n) for n = 1..7260; the first 120 antidiagonals of the array</a> %H A278503 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %H A278503 <a href="/index/Si#sieve">Index entries for sequences generated by sieves</a> %o A278503 (Scheme) (define (A278503 n) (A278505bi (A004736 n) (A002260 n))) ;; A278505bi given in A278505. %Y A278503 Inverse: A278504. %Y A278503 Transpose: A278505. %K A278503 nonn,tabl %O A278503 1,2 %A A278503 _Antti Karttunen_, Nov 23 2016