A201054 - OEIS

A201054

Composite numbers whose product of digits is 5.

15, 51, 115, 511, 1115, 5111, 11115, 11151, 11511, 15111, 51111, 111115, 111151, 111511, 115111, 151111, 1111115, 1111511, 1115111, 1151111, 1511111, 5111111, 11111115, 11111151, 11111511, 11115111, 11151111, 11511111, 15111111, 51111111, 111111115, 111111151

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Complement of A107691 with respect to A199985. Subsequence of A201018 (composite numbers whose multiplicative digital root is 5).

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

EXAMPLE

Number 115 is in sequence because 1*1*5=5.

MAPLE

remove(isprime, [seq(seq((10^m-1)/9 + 4*10^j, j=0..m-1), m=1..10)]); # Robert Israel, Jan 03 2017

CROSSREFS