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 A292335 #9 Aug 24 2021 10:15:25 %S A292335 1,11,253,11891,35167,45023,96569,640343,1035529,1652849,2221087, %T A292335 19588019,30096121,48669863,74901409,88023001,89007677,104391089, %U A292335 143938531,154261943,308731093,395256917,674608561,725434237,920636893,1737332531,2620923899,4137081047,4183360819,5621571197,6765110957,9090909091,10411295851,14510361371 %N A292335 Numbers k such that k^2 divides 10^k + 1. %H A292335 Max Alekseyev, <a href="/A292335/b292335.txt">Table of n, a(n) for n = 1..93</a> %Y A292335 Subsequence of A015958. %Y A292335 Cf. A127100, A128683. %K A292335 nonn %O A292335 1,2 %A A292335 _Max Alekseyev_, Sep 15 2017