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%I #19 Nov 02 2022 13:56:12
%S 12,120,312,612,912,1128,1200,1212,1224,1236,1248,1260,1272,1284,1296,
%T 1512,1812,2112,2124,2412,2712,3012,3120,3312,3612,3912,4128,4212,
%U 4512,4812,5112,5124,5412,5712,6012,6120,6312,6612,6912,7128,7212,7512,7812
%N Multiples of 12 containing a 12 in their decimal representation.
%H Reinhard Zumkeller, <a href="/A121032/b121032.txt">Table of n, a(n) for n = 1..10000</a>
%H <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>.
%F a(n) ~ 12n. - _Charles R Greathouse IV_, Nov 02 2022
%t Select[12*Range[700],SequenceCount[IntegerDigits[#],{1,2}]>0&] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Oct 25 2017 *)
%o (Haskell)
%o import Data.List (isInfixOf)
%o a121032 n = a121032_list !! (n-1)
%o a121032_list = filter ((isInfixOf "12") . show) a008594_list
%o -- _Reinhard Zumkeller_, Dec 12 2012
%o (PARI) is(n)=if(n%12, return(0)); while(n>11, if(n%100==12, return(1)); n\=10); 0 \\ _Charles R Greathouse IV_, Feb 12 2017
%Y Subsequence of A008594.
%Y Cf. A121041, A011531, A121022, A121023, A121024, A121025, A121026, A121027, A121028, A121029, A121030, A121031, A121033, A121034, A121035, A121036, A121037, A121038, A121039, A121040.
%K nonn,base,look,easy
%O 1,1
%A _Reinhard Zumkeller_, Jul 21 2006
%E Data fixed by _Reinhard Zumkeller_, Dec 12 2012
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