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 A359752 #31 Mar 10 2023 13:35:19 %S A359752 1,2,3,4,5,7,6,8,9,11,13,17,19,23,10,12,15,21,27,16,14,22,25,29,31,37, %T A359752 20,33,18,24,35,26,39,41,43,47,49,53,59,61,32,55,67,45,28,30,51,57,63, %U A359752 34,36,71,73,38,44,40,65,79,83,89,85,77,91,69,42,75 %N A359752 Lexicographically earliest array of distinct positive integers read by antidiagonals such that integers in cells which are a knight's move apart are coprime. %H A359752 Jodi Spitz, <a href="/A359752/b359752.txt">Table of n, a(n) for n = 1..5499</a> %H A359752 Rémy Sigrist, <a href="/A359752/a359752.png">Colored representation of the first 500 antidiagonals</a> (plus-shaped patterns correspond to even values) %H A359752 Rémy Sigrist, <a href="/A359752/a359752.gp.txt">PARI program</a> %e A359752 The array begins: %e A359752 1 2 4 6 13 12 22 18 ... %e A359752 3 5 8 17 15 25 24 ... %e A359752 7 9 19 21 29 35 ... %e A359752 11 23 27 31 26 ... %e A359752 10 16 37 39 ... %e A359752 14 20 41 ... %e A359752 33 43 ... %e A359752 47 ... %o A359752 (PARI) See Links section. %Y A359752 Cf. A097883. %K A359752 nonn,tabl %O A359752 1,2 %A A359752 _Jodi Spitz_, Mar 07 2023 %E A359752 More terms from _Rémy Sigrist_, Mar 09 2023 %E A359752 More terms from _Jodi Spitz_, Mar 10 2023