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 A360646 #7 Feb 16 2023 05:06:19 %S A360646 1,2,3,4,6,7,5,12,14,9,8,15,28,18,13,10,24,35,36,26,19,11,30,56,45,52, %T A360646 38,21,16,33,70,72,65,76,42,27,17,48,77,90,104,95,84,54,29,20,51,112, %U A360646 99,130,152,105,108,58,37,22,60,119,144,143,190,168,135,116,74,39 %N A360646 Square array A(n, k), n, k > 0, read by antidiagonals upwards; A(n, k) = A066208(n) * A066207(k). %C A360646 Every positive integer occurs exactly once. %H A360646 Rémy Sigrist, <a href="/A360646/a360646.gp.txt">PARI program</a> %H A360646 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A360646 A(n, 1) = A066208(n) = A247503(A(n,k)). %F A360646 A(1, k) = A066207(k) = A248101(A(n,k)). %e A360646 Array A(n, k) begins: %e A360646 n\k | 1 2 3 4 5 6 7 8 9 10 %e A360646 ----+----------------------------------------------- %e A360646 1 | 1 3 7 9 13 19 21 27 29 37 %e A360646 2 | 2 6 14 18 26 38 42 54 58 74 %e A360646 3 | 4 12 28 36 52 76 84 108 116 148 %e A360646 4 | 5 15 35 45 65 95 105 135 145 185 %e A360646 5 | 8 24 56 72 104 152 168 216 232 296 %e A360646 6 | 10 30 70 90 130 190 210 270 290 370 %e A360646 7 | 11 33 77 99 143 209 231 297 319 407 %e A360646 8 | 16 48 112 144 208 304 336 432 464 592 %e A360646 9 | 17 51 119 153 221 323 357 459 493 629 %e A360646 10 | 20 60 140 180 260 380 420 540 580 740 %o A360646 (PARI) See Links section. %Y A360646 Cf. A249327, A066207, A066208, A247503, A248101. %K A360646 nonn,tabl %O A360646 1,2 %A A360646 _Rémy Sigrist_, Feb 15 2023