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 A265347 #11 Sep 20 2016 13:27:56 %S A265347 1,2,3,4,6,7,8,12,10,5,16,24,20,22,9,64,48,40,28,18,21,32,192,80,56, %T A265347 36,30,13,184,96,160,112,72,60,26,19,352,552,640,224,144,120,52,14,25, %U A265347 704,1056,320,448,576,240,208,76,46,11,1408,2112,1600,1720,288,480,104,136,68,58,15 %N A265347 Transpose of square array A265345. %C A265347 Square array A(row,col) is read by downwards antidiagonals as: A(0,0), A(0,1), A(1,0), A(0,2), A(1,1), A(2,0), A(0,3), A(1,2), A(2,1), A(3,0), ... %C A265347 All the terms in the same row are either all divisible by 3, or none of them are. %C A265347 Sequence A265345 is the main entry for this idea, please see further comment there. %H A265347 Antti Karttunen, <a href="/A265347/b265347.txt">Table of n, a(n) for n = 1..2145; the antidiagonals 0 .. 64 of the array</a> %H A265347 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A265347 The top left corner of the array: %e A265347 1, 2, 4, 8, 16, 64, 32, 184, 352, 704, 1408, ... %e A265347 3, 6, 12, 24, 48, 192, 96, 552, 1056, 2112, 4224, ... %e A265347 7, 10, 20, 40, 80, 160, 640, 320, 1600, 3520, 6080, ... %e A265347 5, 22, 28, 56, 112, 224, 448, 1720, 824, 4936, 9856, ... %e A265347 9, 18, 36, 72, 144, 576, 288, 1656, 3168, 6336, 12672, ... %e A265347 21, 30, 60, 120, 240, 480, 1920, 960, 4800, 10560, 18240, ... %e A265347 13, 26, 52, 208, 104, 520, 1144, 2072, 3712, 16120, 6968, ... %e A265347 19, 14, 76, 136, 200, 256, 512, 1024, 6040, 3992, 15424, ... %e A265347 25, 46, 68, 88, 496, 344, 1984, 1376, 5344, 7768, 15224, ... %e A265347 11, 58, 44, 232, 424, 608, 736, 4384, 2936, 17536, 11744, ... %e A265347 ... %o A265347 (Scheme) %o A265347 (define (A265347 n) (A265345bi (A025581 (+ -1 n)) (A002262 (+ -1 n)))) ;; o=1. Transpose of A265345. %Y A265347 Inverse permutation: A265348. %Y A265347 Transpose: A265345. %K A265347 nonn,tabl,base %O A265347 1,2 %A A265347 _Antti Karttunen_, Dec 18 2015