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 A137248 #6 Dec 21 2015 12:31:52 %S A137248 2,3,13,23,0,43,233,0,433,2333,0,3343,23333,0,33343,323333,0,333433, %T A137248 3233333,0,3333433,32333333,0,34333333,333233333,0,333334333, %U A137248 3233333333,0,3334333333,23333333333,0,33333333343,333332333333,0,333333343333 %N A137248 The smallest prime with digit sum n and maximum digit product (or 0 if no such prime exists). %C A137248 Conjecture: If n > 4 and a(n) > 0, then a(n) consists only of the digits 2, 3 and 4. - _Chai Wah Wu_, Dec 17 2015 %H A137248 Chai Wah Wu, <a href="/A137248/b137248.txt">Table of n, a(n) for n = 2..2001</a> %Y A137248 Cf. A083178. %K A137248 nonn,base %O A137248 2,1 %A A137248 _Lekraj Beedassy_, Mar 10 2008