A285846 A039938 with duplicates removed.

7, 37, 237, 1789, 4357, 14379, 19587, 93957, 189572, 189597, 1234397, 1839597, 1958798, 1983957, 3978594, 11983957, 19596487, 29195397, 39599197, 195991487, 339799143, 395991697, 1429199397, 1679895983, 1983994799, 2239951987, 11959939917, 15991995897

Offset

1,1

Comments

Any proof that this sequence is infinite?

This sequence is infinite because A039938 is indeed infinite and for any number k there is a multiple of k which does not contain a '7', so A039938 contains infinitely many distinct terms. Both parts are easy to prove. - Giovanni Resta, Feb 26 2019

Links

Giovanni Resta, Table of n, a(n) for n = 1..32

Mathematica

Union@ Table[SelectFirst[Range[10^6], Times @@ Boole@ Map[DigitCount[#, 10, 7] > 0 &, # Range@ n] > 0 &], {n, 12}] (* Michael De Vlieger, Apr 27 2017, Version 10 *)

Crossrefs

Cf. A039938.

Subsequence of A011537.

Sequence in context: A144496 A025012 A039938 * A102760 A332906 A361279

Adjacent sequences: A285843 A285844 A285845 * A285847 A285848 A285849

Keyword

nonn,base

Author

J. Lowell, Apr 27 2017

Extensions

a(19)-a(28) from Giovanni Resta, Apr 27 2017

Status

approved