%I #10 Mar 30 2012 19:00:25

%S 10,1,12,1113,4,15,6,117,8,9,25,0,26,0,27,35,28,0,36,0,45,371,0,0,38,

%T 55,0,39,74,0,56,0,48,0,0,57,49,0,0,0,58,0,76,0,0,95,0,0,68,77,255,0,

%U 0,0,69,0,78,0,0,0,256,0,0,791,88,0,0,0,0,0,275,0,98,0,0,355

%N Smallest nonprime positive numbers whose digital product = n, or 0 if impossible.

%C Zeros appear for n which are a member of A068191.

%C If the requirement "positive" is dropped, a(0) becomes 0 instead.

%e a(21)=371 because 371 is the smallest nonprime positive number whose digital product is 21 (3*7*1 = 21).

%Y Cf. A107698 (smallest primes with digital product n)

%K nonn,base

%O 0,1

%A _Jaroslav Krizek_, Oct 25 2011