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 A273338 #5 May 20 2016 13:54:39 %S A273338 2,3,6,4,7,12,42,5,8,13,20,43,56,156,1806,6,9,14,21,30,44,57,72,157, %T A273338 182,420,1807,1892,3192,24492,3263442,7,10,15,22,31,42,45,58,73,90, %U A273338 158,183,210,421,462,930,1808,1893,1980,3193,3306,5256,24493,24806,33306,176820,3263443,3267056,3581556,10192056 %N A273338 Alternate version of A273317 with rows sorted in ascending order. %C A273338 See the entry A273317 for more details. %C A273338 Row n has 2^n entries. %e A273338 The triangle begins: %e A273338 2, %e A273338 3, 6, %e A273338 4, 7, 12, 42, %e A273338 5, 8, 13, 20, 43, 56, 156, 1806, %e A273338 6, 9, 14, 21, 30, 44, 57, 72, 157, 182, 420, 1807, 1892, 3192, 24492, 3263442, %Y A273338 Cf. A273317. %K A273338 nonn,tabf %O A273338 0,1 %A A273338 _Tom Edgar_, May 20 2016