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 A043485 #22 Apr 24 2021 21:01:18 %S A043485 8,17,26,35,44,53,62,71,72,73,74,75,76,77,78,79,89,98,107,116,125,134, %T A043485 143,152,153,154,155,156,157,158,159,160,170,179,188,197,206,215,224, %U A043485 233,234,235,236,237,238,239,240,241,251,260,269,278,287,296,305,314 %N A043485 Numbers having one 8 in base 9. %t A043485 Select[Range[300],DigitCount[#,9,8]==1&] (* _Harvey P. Dale_, Jun 26 2011 *) %o A043485 (PARI) isok(m) = #select(x->(x==8), digits(m, 9)) == 1; \\ _Michel Marcus_, Oct 13 2020 %Y A043485 Cf. A007095 (numbers in base 9), A338090. %K A043485 nonn,base %O A043485 1,1 %A A043485 _Clark Kimberling_ %E A043485 Name edited by _Michel Marcus_, Oct 13 2020