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 A257254 #11 Sep 20 2016 13:26:57 %S A257254 1,3,1,10,3,1,21,5,3,1,55,14,10,3,1,78,11,7,5,3,1,136,26,22,14,10,3,1, %T A257254 171,17,13,11,7,5,3,1,253,38,34,26,22,14,10,3,1,406,69,57,51,39,33,21, %U A257254 5,3,1,465,29,23,19,17,13,11,7,10,3,1,666,93,87,69,57,51,39,33,21,5,3,1 %N A257254 Transpose of square array A257253. %C A257254 See A257253. %H A257254 Antti Karttunen, <a href="/A257254/b257254.txt">Table of n, a(n) for n = 1..3321; the first 81 antidiagonals of the array</a> %e A257254 The top left corner of the array: %e A257254 1, 3, 10, 21, 55, 78, 136, 171, 253, 406, 465, 666, 820, 903 %e A257254 1, 3, 5, 14, 11, 26, 17, 38, 69, 29, 93, 74, 41, 86 %e A257254 1, 3, 10, 7, 22, 13, 34, 57, 23, 87, 62, 37, 82, 129 %e A257254 1, 3, 5, 14, 11, 26, 51, 19, 69, 58, 31, 74, 123, 129 %e A257254 1, 3, 10, 7, 22, 39, 17, 57, 46, 29, 62, 111, 123, 43 %e A257254 1, 3, 5, 14, 33, 13, 51, 38, 23, 58, 93, 111, 41, 129 %e A257254 1, 3, 10, 21, 11, 39, 34, 19, 46, 87, 93, 37, 123, 86 %e A257254 1, 3, 5, 7, 33, 26, 17, 38, 69, 87, 31, 111, 82, 43 %e A257254 1, 3, 10, 21, 22, 13, 34, 57, 69, 29, 93, 74, 41, 129 %e A257254 1, 3, 5, 14, 11, 26, 51, 57, 23, 87, 62, 37, 123, 86 %e A257254 1, 3, 10, 7, 22, 39, 51, 19, 69, 58, 31, 111, 82, 129 %e A257254 1, 3, 5, 14, 33, 39, 17, 57, 46, 29, 93, 74, 123, 172 %e A257254 1, 3, 10, 7, 33, 13, 51, 38, 23, 87, 62, 111, 164, 86 %e A257254 1, 3, 5, 14, 11, 39, 34, 19, 69, 58, 93, 148, 82, 43 %e A257254 1, 3, 10, 21, 33, 26, 17, 57, 46, 87, 124, 74, 41, 86 %e A257254 1, 3, 5, 7, 22, 13, 51, 38, 69, 116, 62, 37, 82, 43 %e A257254 ... %o A257254 (Scheme) (define (A257254 n) (A257253bi (A004736 n) (A002260 n))) ;; Code for A257253bi given in A257253. %Y A257254 Transpose: A257253. %Y A257254 Row 1: A008837. %Y A257254 Cf. A083140, A083221, A257252 (same array but with terms multiplied by 2). %K A257254 nonn,tabl %O A257254 1,2 %A A257254 _Antti Karttunen_, Apr 29 2015