A121032 Multiples of 12 containing a 12 in their decimal representation.

12, 120, 312, 612, 912, 1128, 1200, 1212, 1224, 1236, 1248, 1260, 1272, 1284, 1296, 1512, 1812, 2112, 2124, 2412, 2712, 3012, 3120, 3312, 3612, 3912, 4128, 4212, 4512, 4812, 5112, 5124, 5412, 5712, 6012, 6120, 6312, 6612, 6912, 7128, 7212, 7512, 7812

Offset

1,1

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Index entries for 10-automatic sequences.

Formula

a(n) ~ 12n. - Charles R Greathouse IV, Nov 02 2022

Mathematica

Select[12*Range[700], SequenceCount[IntegerDigits[#], {1, 2}]>0&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Oct 25 2017 *)

Prog

(Haskell)
import Data.List (isInfixOf)
a121032 n = a121032_list !! (n-1)
a121032_list = filter ((isInfixOf "12") . show) a008594_list
-- Reinhard Zumkeller, Dec 12 2012
(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

Crossrefs

Subsequence of A008594.

Cf. A121041, A011531, A121022, A121023, A121024, A121025, A121026, A121027, A121028, A121029, A121030, A121031, A121033, A121034, A121035, A121036, A121037, A121038, A121039, A121040.

Sequence in context: A110423 A006953 A164877 * A188251 A093334 A001816

Adjacent sequences: A121029 A121030 A121031 * A121033 A121034 A121035

Keyword

nonn,base,look,easy

Author

Reinhard Zumkeller, Jul 21 2006

Extensions

Data fixed by Reinhard Zumkeller, Dec 12 2012

Status

approved