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 A353145 #13 Apr 27 2022 19:49:02 %S A353145 0,1,15,303,5051,123235,2214223,35452011,1034052155,15005255143, %T A353145 302130544531,5034313401115,123013240420103,2210234251121451, %U A353145 35344212440150035,1032151423443021023,14535045221530334411,301223205551110014555 %N A353145 Decimal repunits written in base 6. %F A353145 a(n) = A007092(A002275(n)). %o A353145 (PARI) a(n) = fromdigits(digits((10^n-1)/9, 6)); %Y A353145 Cf. A002275, A291962, A353142, A353143, A353144, A353146, A353147, A353148. %Y A353145 Cf. A003464, A007092. %K A353145 nonn,base,easy %O A353145 0,3 %A A353145 _Seiichi Manyama_, Apr 26 2022