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 A293878 #22 Feb 26 2024 09:41:55 %S A293878 18,118,180,181,182,183,184,185,186,187,188,189,218,318,418,518,618, %T A293878 718,818,918,1018,1118,1180,1181,1182,1183,1184,1185,1186,1187,1188, %U A293878 1189,1218,1318,1418,1518,1618,1718,1800,1801,1802,1803,1804,1805,1806,1807,1808,1809,1810,1811,1812 %N A293878 Numbers having '18' as substring of their digits / decimal expansion. %C A293878 Row 16 of A292690 and A293869. A121038 lists the terms which are divisible by 18. %H A293878 Paolo Xausa, <a href="/A293878/b293878.txt">Table of n, a(n) for n = 1..10000</a> %H A293878 <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a> %F A293878 a(n) ~ n. - _Charles R Greathouse IV_, Nov 02 2022 %t A293878 Select[Range[2000], StringContainsQ[IntegerString[#], "18"] &] (* _Paolo Xausa_, Feb 25 2024 *) %o A293878 (PARI) is_A293878 = has(n, p=18, m=10^#Str(p))=until(p>n\=10, n%m==p&&return(1)) %Y A293878 Cf. A292690, A293869. %Y A293878 Cf. A011540, A011531, A011532, A011533, A011534, A011535, A011536, A011537, A011538, A011539: analog for '0' - '9'. %Y A293878 Cf. A293870, A293871, A293872, A293873, A293874, A293875, A293876, A293877, A293879, A293880: same for '10' - '20'. %Y A293878 Cf. A121041, A121022, A121023, A121024, A121025, A121026, A121027, A121028, A121029, A121030, A121031, A121032, A121033, A121034, A121035, A121036, A121037, A121038, A121039, A121040: subsequences of the above, containing only multiples of the pattern p. %K A293878 nonn,base,easy %O A293878 1,1 %A A293878 _M. F. Hasler_, Oct 18 2017