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A277594 Numbers k such that k/10^m == 7 mod 10, where 10^m is the greatest power of 10 that divides n. 9
7, 17, 27, 37, 47, 57, 67, 70, 77, 87, 97, 107, 117, 127, 137, 147, 157, 167, 170, 177, 187, 197, 207, 217, 227, 237, 247, 257, 267, 270, 277, 287, 297, 307, 317, 327, 337, 347, 357, 367, 370, 377, 387, 397, 407, 417, 427, 437, 447, 457, 467, 470, 477, 487 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Positions of 7 in A065881.

Numbers having 7 as rightmost nonzero digit in base 10. This is one sequence in a 10-way splitting of the positive integers; the other nine are indicated in the Mathematica program.

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..10000

MATHEMATICA

z = 460; a[b_] := Table[Mod[n/b^IntegerExponent[n, b], b], {n, 1, z}]

p[b_, d_] := Flatten[Position[a[b], d]]

p[10, 1] (* A277588 *)

p[10, 2] (* A277589 *)

p[10, 3] (* A277590 *)

p[10, 4] (* A277591 *)

p[10, 5] (* A277592 *)

p[10, 6] (* A277593 *)

p[10, 7] (* A277594 *)

p[10, 8] (* A277595 *)

p[10, 9] (* A277596 *)

PROG

(PARI) is(n)=n && n/10^valuation(n, 10)%10==7 \\ Charles R Greathouse IV, Jan 31 2017

CROSSREFS

Cf. A277588-A277593, A277595-A277596.

Sequence in context: A011537 A283610 A043517 * A160912 A017353 A147089

Adjacent sequences:  A277591 A277592 A277593 * A277595 A277596 A277597

KEYWORD

nonn,easy,base

AUTHOR

Clark Kimberling, Nov 07 2016

STATUS

approved

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Last modified April 22 08:25 EDT 2019. Contains 322329 sequences. (Running on oeis4.)