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

Author

Reinhard Zumkeller, Jul 21 2006

Keywords

• nonn
• base
• look
• easy

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
• Index entries for 10-automatic sequences.

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.

Programs

Haskell

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

Mathematica

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

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

Formula

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

Extensions

Data fixed by Reinhard Zumkeller, Dec 12 2012