This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A121040 Multiples of 20 containing a 20 in their decimal representation. 35
 20, 120, 200, 220, 320, 420, 520, 620, 720, 820, 920, 1020, 1120, 1200, 1220, 1320, 1420, 1520, 1620, 1720, 1820, 1920, 2000, 2020, 2040, 2060, 2080, 2120, 2200, 2220, 2320, 2420, 2520, 2620, 2720, 2820, 2920, 3020, 3120, 3200, 3220, 3320, 3420, 3520 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Not the same as A044352. LINKS FORMULA a(n) ~ 20n. - Charles R Greathouse IV, Feb 12 2017 MATHEMATICA Select[20*Range[200], SequenceCount[IntegerDigits[#], {2, 0}]>0&] (* The program uses the SequenceCount function from Mathematica version 10 *) (* Harvey P. Dale, Nov 27 2015 *) PROG (PARI) is(n)=if(n%20, return(0)); while(n>19, if(n%100==20, return(1)); n\=10); 0 \\ Charles R Greathouse IV, Feb 12 2017 CROSSREFS Cf. A121041, A008602, A011531, A121022, A121023, A121024, A121025, A121026, A121027, A121028, A121029, A121030, A121031, A121032, A121033, A121034, A121035, A121036, A121037, A121038, A121039. Sequence in context: A299965 A244289 A293880 * A044352 A044733 A280439 Adjacent sequences:  A121037 A121038 A121039 * A121041 A121042 A121043 KEYWORD nonn,base,easy AUTHOR Reinhard Zumkeller, Jul 21 2006 EXTENSIONS Corrected by T. D. Noe, Oct 25 2006 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 22 00:52 EDT 2019. Contains 328315 sequences. (Running on oeis4.)