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 A342046 #10 Feb 28 2021 09:54:41 %S A342046 0,1,2,3,4,5,6,7,8,9,10,11,12,34,13,40,14,15,60,16,17,80,18,19,23,41, %T A342046 24,25,61,26,27,81,28,29,35,62,36,37,82,38,39,42,43,44,45,63,46,47,83, %U A342046 48,49,56,57,84,58,59,64,65,66,67,85,68,69,78,79,86,87,88,89,90,91,92,93,94,95,96,97,98,99 %N A342046 When a digit d is prime, the next digit is > d. %C A342046 After a(1) = 0, the sequence is always extended with the smallest positive integer not yet present that doesn't lead to a contradiction. %H A342046 Rémy Sigrist, <a href="/A342046/b342046.txt">Table of n, a(n) for n = 1..10000</a> %H A342046 Rémy Sigrist, <a href="/A342046/a342046.gp.txt">PARI program for A342046</a> %o A342046 (PARI) See Links section. %Y A342046 Cf. A342042, A342043, A342044, A342045 and A342047 (variations on the same idea). %K A342046 base,nonn %O A342046 1,3 %A A342046 _Eric Angelini_, Feb 26 2021