This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A198487 #10 Mar 30 2012 19:00:25 %S A198487 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 A198487 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 A198487 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 A198487 Smallest nonprime positive numbers whose digital product = n, or 0 if impossible. %C A198487 Zeros appear for n which are a member of A068191. %C A198487 If the requirement "positive" is dropped, a(0) becomes 0 instead. %e A198487 a(21)=371 because 371 is the smallest nonprime positive number whose digital product is 21 (3*7*1 = 21). %Y A198487 Cf. A107698 (smallest primes with digital product n) %K A198487 nonn,base %O A198487 0,1 %A A198487 _Jaroslav Krizek_, Oct 25 2011