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 A277897 #6 Nov 14 2016 10:37:33 %S A277897 3,5,4,7,9,6,11,25,12,8,13,49,33,14,10,17,93,58,35,15,18,19,169,119, %T A277897 65,44,16,22,23,287,185,121,77,45,20,24,29,361,289,209,124,91,51,21, %U A277897 30,31,529,437,299,214,143,95,55,26,32,37,802,589,473,323,221,161,106,57,27,40,41,934,841,611,493,327,247,177,111,60,28,42 %N A277897 Transpose of square array A277898. %C A277897 See A277898. %H A277897 Antti Karttunen, <a href="/A277897/b277897.txt">Table of n, a(n) for n = 3..353; the first 26 antidiagonals of array</a> %o A277897 (Scheme) (define (A277897 n) (if (< n 3) n (A277898bi (A004736 (- n 2)) (A002260 (- n 2))))) ;; Code for A277898bi given in A277898. %Y A277897 Transpose: A277898. %K A277897 nonn,tabl %O A277897 3,1 %A A277897 _Antti Karttunen_, Nov 08 2016