A121035 Multiples of 15 containing a 15 in their decimal representation.

15, 150, 315, 615, 915, 1155, 1215, 1500, 1515, 1530, 1545, 1560, 1575, 1590, 1815, 2115, 2415, 2715, 3015, 3150, 3315, 3615, 3915, 4155, 4215, 4515, 4815, 5115, 5415, 5715, 6015, 6150, 6315, 6615, 6915, 7155, 7215, 7515, 7815, 8115, 8415, 8715, 9015

Offset: 1

Author

Reinhard Zumkeller, Jul 21 2006, Jul 26 2006

Keywords

• nonn
• base
• easy

Links

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

Crossrefs

Cf. A121041, A008597, A011531, A121022, A121023, A121024, A121025, A121026, A121027, A121028, A121029, A121030, A121031, A121032, A121033, A121034, A121036, A121037, A121038, A121039, A121040.

Programs

Mathematica

Select[15*Range[1000], StringContainsQ[IntegerString[#], "15"] &] (* Paolo Xausa, Feb 25 2024 *)

PARI

is(n)=if(n%15, return(0)); while(n>14, if(n%100==15, return(1)); n\=10); 0 \\ Charles R Greathouse IV, Feb 12 2017

Formula

a(n) ~ 15n. - Charles R Greathouse IV, Nov 02 2022