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 A011538 #24 Jul 08 2025 02:26:28 %S A011538 8,18,28,38,48,58,68,78,80,81,82,83,84,85,86,87,88,89,98,108,118,128, %T A011538 138,148,158,168,178,180,181,182,183,184,185,186,187,188,189,198,208, %U A011538 218,228,238,248,258,268,278,280,281,282,283,284,285,286,287,288,289 %N A011538 Numbers that contain an 8. %C A011538 In China, numbers with many 8 digits are considered auspicious because the character for 8 (八) sounds like the character for wealth (發). - _Charles R Greathouse IV_, Aug 28 2012 %H A011538 Vincenzo Librandi, <a href="/A011538/b011538.txt">Table of n, a(n) for n = 1..3439</a> %H A011538 <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>. %F A011538 a(n) ~ n. - _Charles R Greathouse IV_, Aug 28 2012 %t A011538 Select[Range[400], DigitCount[#, 10, 8]>0 &] (* _Vincenzo Librandi_, Feb 15 2017 *) %o A011538 (PARI) is(n)=!!setsearch(Set(digits(n)), 8) \\ _Charles R Greathouse IV_, Feb 12 2017 %o A011538 (Magma) [n: n in [0..400] | 8 in Intseq(n) ]; // _Vincenzo Librandi_, Feb 15 2017 %o A011538 (GAP) Filtered([1..290],n->8 in ListOfDigits(n)); # _Muniru A Asiru_, Feb 24 2019 %o A011538 (Python) %o A011538 def ok(n): return '8' in str(n) %o A011538 print(list(filter(ok, range(290)))) # _Michael S. Branicky_, Aug 18 2021 %Y A011538 Supersequence of A043521. %K A011538 nonn,base,easy %O A011538 1,1 %A A011538 _N. J. A. Sloane_