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 A343108 #11 Apr 06 2021 11:03:56 %S A343108 1,2,4,5,7,8,10,13,14,16,17,20,23,25,26,28,29,31,32,34,37,40,41,46,47, %T A343108 49,50,52,53,56,58,61,62,64,65,68,71,73,74,79,80,82,85,89,92,94,97,98, %U A343108 100,101,103,104,106,109,112,113,116,119,122,124,125,127,128 %N A343108 Numbers having no divisor of the form 8*k + 3. %C A343108 Numbers not divisible by at least one of 3, 11, 19, ... %H A343108 Jianing Song, <a href="/A343108/b343108.txt">Table of n, a(n) for n = 1..10000</a> %e A343108 7 is a term since it has no divisor congruent to 3 modulo 8. %o A343108 (PARI) res(n,a,b) = sumdiv(n, d, (d%a) == b) %o A343108 isA343108(n) = (res(n,8,3) == 0) %Y A343108 Numbers having m divisors of the form 8*k + i: A343107 (m=1, i=1), this sequence (m=0, i=3), A343109 (m=0, i=5), A343110 (m=0, i=7), A343111 (m=2, i=1), A343112 (m=1, i=3), A343113 (m=1, i=5), A141164 (m=1, i=7). %Y A343108 Indices of 0 in A188170. %K A343108 nonn,easy %O A343108 1,2 %A A343108 _Jianing Song_, Apr 05 2021