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 A353148 #15 Apr 27 2022 19:49:26 %S A353148 0,1,12,133,1464,16215,178366,2073137,22814518,252060710,2772667811, %T A353148 31610457022,347715137243,3835866520674,43305642727525, %U A353148 476363171113776,5351104882252647,58862154814780228,658583714063682520,7355531854711617721,82021851512827806032 %N A353148 Decimal repunits written in base 9. %F A353148 a(n) = A007095(A002275(n)). %F A353148 a(n) = (A055479(n) - 1)/10. - _Hugo Pfoertner_, Apr 26 2022 %o A353148 (PARI) a(n) = fromdigits(digits((10^n-1)/9, 9)); %Y A353148 Cf. A002275, A291962, A353142, A353143, A353144, A353145, A353146, A353147. %Y A353148 Cf. A002452, A007095, A055479. %K A353148 nonn,base,easy %O A353148 0,3 %A A353148 _Seiichi Manyama_, Apr 26 2022