1,1

Complement of A201018 with respect to A034052.

Table of n, a(n) for n=1..44.

Eric Weisstein's World of Mathematics, Multiplicative Digital Root

Prime 157 is in the sequence because 1*5*7=35, 3*5=15, 1*5=5.

Cf. A201018 (composite numbers whose multiplicative digital root is 5), A034052 (numbers whose multiplicative digital root is 5).

Sequence in context: A139869 A072156 A101190 * A106097 A163580 A075540

Adjacent sequences: A201014 A201015 A201016 * A201018 A201019 A201020

nonn,base

Jaroslav Krizek, Nov 25 2011

approved