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

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

Cf. A107691 (primes whose product of digits is 5), A199985 (numbers whose product of digits is 5).

Sequence in context: A039405 A043228 A044008 * A009962 A211563 A214522

Adjacent sequences: A201051 A201052 A201053 * A201055 A201056 A201057

Keyword

nonn,base

Author

Jaroslav Krizek, Nov 26 2011

Status

approved