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 A293872 Numbers having '12' as a substring of their digits. 12
 12, 112, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 212, 312, 412, 512, 612, 712, 812, 912, 1012, 1112, 1120, 1121, 1122, 1123, 1124, 1125, 1126, 1127, 1128, 1129, 1200, 1201, 1202, 1203, 1204, 1205, 1206, 1207, 1208, 1209, 1210, 1211, 1212, 1213, 1214, 1215, 1216, 1217, 1218 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 12 of A292690 and A293869. A121032 is the subsequence of multiples of 12. LINKS Robert Israel, Table of n, a(n) for n = 1..10000 MAPLE f:= proc(d) local i, x, y;   sort(convert({seq(seq(seq(x+10^i*12+10^(i+2)*y, y=10^(d-3-i)..10^(d-2-i)-1), x=0..10^i-1), i=0..d-3), seq(12*10^(d-2)+x, x=0..10^(d-2)-1)}, list)) end proc: seq(op(f(d)), d=2..4); # Robert Israel, Nov 20 2017 MATHEMATICA Select[Range@ 1220, SequenceCount[IntegerDigits[#], {1, 2}] > 0 &] (* Michael De Vlieger, Nov 20 2017 *) PROG (PARI) is_A293872 = has(n, p=12, m=10^#Str(p))=until(p>n\=10, n%m==p&&return(1)) CROSSREFS Cf. A292690, A293869. Cf. A011540, A011531, A011532, A011533, A011534, A011535, A011536, A011537, A011538, A011539: analog for '0' - '9'. Cf. A293870, A293871, A293873, A293874, A293875, A293876, A293877, A293878, A293879, A293880: same for '10' - '20'. 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. Sequence in context: A199691 A077754 A199357 * A044344 A130838 A225189 Adjacent sequences:  A293869 A293870 A293871 * A293873 A293874 A293875 KEYWORD nonn,base,easy AUTHOR M. F. Hasler, Oct 18 2017 STATUS approved

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Last modified April 22 08:06 EDT 2019. Contains 322329 sequences. (Running on oeis4.)