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 A265895 #13 Dec 29 2015 03:22:11 %S A265895 1,3,2,5,6,4,7,10,12,8,9,14,20,24,16,15,18,28,40,48,32,13,30,36,56,80, %T A265895 96,64,11,26,60,72,112,160,192,128,17,22,52,120,144,224,320,384,256, %U A265895 19,34,44,104,240,288,448,640,768,512,21,38,68,88,208,480,576,896,1280,1536,1024,39,42,76,136,176,416,960,1152,1792,2560,3072,2048 %N A265895 Square array: A(row,col) = A263273(A265345(row,col)) = 2^row * A263273(A265341(col)). %C A265895 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 A265895 Shares with arrays A135764, A253551 and A254053 the property that odd terms are on the top row and when going downward in each column, terms grow by doubling. %H A265895 Antti Karttunen, <a href="/A265895/b265895.txt">Table of n, a(n) for n = 1..7381; the antidiagonals 0 .. 120 of the array</a> %H A265895 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A265895 A(row,col) = A263273(A265345(row,col)). %F A265895 A(row,col) = 2^row * A263273(A265341(col)). %e A265895 The top left corner of the array: %e A265895 1, 3, 5, 7, 9, 15, 13, 11, 17, 19, 21, 39, %e A265895 2, 6, 10, 14, 18, 30, 26, 22, 34, 38, 42, 78, %e A265895 4, 12, 20, 28, 36, 60, 52, 44, 68, 76, 84, 156, %e A265895 8, 24, 40, 56, 72, 120, 104, 88, 136, 152, 168, 312, %e A265895 16, 48, 80, 112, 144, 240, 208, 176, 272, 304, 336, 624, %e A265895 32, 96, 160, 224, 288, 480, 416, 352, 544, 608, 672, 1248, %e A265895 64, 192, 320, 448, 576, 960, 832, 704, 1088, 1216, 1344, 2496, %e A265895 128, 384, 640, 896, 1152, 1920, 1664, 1408, 2176, 2432, 2688, 4992, %e A265895 256, 768, 1280, 1792, 2304, 3840, 3328, 2816, 4352, 4864, 5376, 9984, %e A265895 ... %o A265895 (Scheme, two alternatives) %o A265895 (define (A265895 n) (A263273 (A265345 n))) %o A265895 (define (A265895 n) (A265895bi (A002262 (+ -1 n)) (A025581 (+ -1 n)))) %o A265895 (define (A265895bi row col) (A263273 (A265345bi row col))) %Y A265895 Inverse permutation: A265896. %Y A265895 The top row: 1+(2*A263273(n)). %Y A265895 Cf. A263273, A265341, A265345. %Y A265895 Differs from A135764 for the first time at n=16, where a(16) = 15, while A135764(16) = 11. %K A265895 nonn,tabl,base %O A265895 1,2 %A A265895 _Antti Karttunen_, Dec 18 2015