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A062675 Every divisor (except 1) contains the digit 7. 2
7, 17, 37, 47, 67, 71, 73, 79, 97, 107, 127, 137, 157, 167, 173, 179, 197, 227, 257, 271, 277, 307, 317, 337, 347, 367, 373, 379, 397, 457, 467, 479, 487, 497, 547, 557, 571, 577, 587, 607, 617, 647, 673, 677, 679, 701, 709, 719, 727, 733, 739, 743, 749, 751 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

EXAMPLE

799 has divisors 17, 47 and 799, all of which contain the digit 7

MATHEMATICA

fQ[n_, dgt_] := Union[ MemberQ[#, dgt] & /@ IntegerDigits@ Rest@ Divisors@ n][[1]]; Select[ Range[2, 760], fQ[#, 7] &]  (* Robert G. Wilson v, Jun 11 2014 *)

CROSSREFS

Sequence in context: A212117 A160635 A090652 * A257668 A106095 A153319

Adjacent sequences:  A062672 A062673 A062674 * A062676 A062677 A062678

KEYWORD

nonn,base,easy

AUTHOR

Erich Friedman, Jul 04 2001

STATUS

approved

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Last modified October 17 08:36 EDT 2019. Contains 328107 sequences. (Running on oeis4.)