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 A043292 #11 Feb 12 2023 10:33:48 %S A043292 1,2,7,11,13,17,19,23,29,47,49,59,61,73,77,89,91,97,101,103,109,113, %T A043292 121,127,131,133,137,139,143,149,157,161,167,169,179,181,193,197,209, %U A043292 211,223,229,233,241,247,251,253,257,263,269,281,289,293,299,313,329 %N A043292 Numbers that divide 10^k + 1 for some k. %H A043292 Robert Israel, <a href="/A043292/b043292.txt">Table of n, a(n) for n = 1..10000</a> %p A043292 filter:= n -> traperror(NumberTheory:-ModularLog(-1,10,n)) <> "no solutions exist": %p A043292 filter(2):= true: %p A043292 select(filter, [$1..500]); # _Robert Israel_, Feb 11 2023 %Y A043292 Cf. A014657, A069531. %Y A043292 Odd primes in this sequence are A028416. %K A043292 nonn %O A043292 1,2 %A A043292 _Vladeta Jovovic_, Apr 04 2002