A121027 Multiples of 7 containing a 7 in their decimal representation.

7, 70, 77, 147, 175, 217, 273, 287, 357, 371, 378, 427, 476, 497, 567, 574, 637, 672, 679, 700, 707, 714, 721, 728, 735, 742, 749, 756, 763, 770, 777, 784, 791, 798, 847, 875, 917, 973, 987, 1057, 1071, 1078, 1127, 1176, 1197, 1267, 1274, 1337, 1372, 1379

Offset: 1

Author

Reinhard Zumkeller, Jul 21 2006

Keywords

• nonn
• base
• easy

Links

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

Crossrefs

Intersection of A008589 and A011537.

Cf. A121041, A011531, A121022, A121023, A121024, A121025, A121026, A121028, A121029, A121030, A121031, A121032, A121033, A121034, A121035, A121036, A121037, A121038, A121039, A121040.

Programs

Mathematica

Select[7*Range[500], MemberQ[IntegerDigits[#], 7] &] (* Paolo Xausa, Feb 25 2024 *)

PARI

is(n)=n%7==0 && setsearch(Set(digits(n)), 7) \\ Charles R Greathouse IV, Feb 12 2017

Formula

a(n) ~ 7n. - Charles R Greathouse IV, Feb 12 2017

Extensions

Typo in comment fixed by Reinhard Zumkeller, May 01 2011