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 A338918 #14 Nov 18 2020 20:02:55 %S A338918 1,2,4,3,8,6,12,18,24,16,5,32,9,40,10,30,20,36,48,50,42,7,60,15,64,45, %T A338918 72,14,56,28,54,80,100,90,70,88,27,96,21,120,25,144,63,112,81,110,108, %U A338918 168,84,150,180,140,192,126,130,11,160,135,128,35,216,105,224,162,200,22 %N A338918 Square array of distinct positive integers T(n, k), n > 0, k > 0, read by antidiagonals upwards, filled the greedy way such that for any n > 0 and k > 0, T(n, k) is divisible by n * k. %C A338918 All integers appear in this sequence. %H A338918 Rémy Sigrist, <a href="/A338918/b338918.txt">Table of n, a(n) for n = 1..5050</a> %H A338918 Rémy Sigrist, <a href="/A338918/a338918.gp.txt">PARI program for A338918</a> %H A338918 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A338918 T(p, 1) = p for any prime number p. %e A338918 Array T(n, k) begins: %e A338918 n\k| 1 2 3 4 5 6 7 8 9 10 %e A338918 ---+-------------------------------------------------- %e A338918 1| 1 4 6 16 10 42 14 88 81 130 %e A338918 2| 2 8 24 40 50 72 70 112 126 200 %e A338918 3| 3 18 9 48 45 90 63 192 162 270 %e A338918 4| 12 32 36 64 100 144 140 224 288 360 %e A338918 5| 5 20 15 80 25 180 105 280 315 300 %e A338918 6| 30 60 54 120 150 216 336 432 486 540 %e A338918 7| 7 28 21 84 35 294 49 448 441 490 %e A338918 8| 56 96 168 128 240 384 392 256 576 640 %e A338918 9| 27 108 135 252 225 378 189 504 243 900 %e A338918 10| 110 160 210 320 250 420 350 400 810 500 %o A338918 (PARI) See Links section. %Y A338918 See A338872 and A338919 for similar sequences. %K A338918 nonn,look,tabl %O A338918 1,2 %A A338918 _Rémy Sigrist_, Nov 15 2020