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 A260904 #11 Nov 18 2015 11:38:25 %S A260904 2,3,5,7,11,13,4673,5153,8513,16673,17895719,17899799,17985809, %T A260904 18288929,34697489,40964369,118563089,286337041,286359841,293675281, %U A260904 403775761,554766721,554795281,73303933201,74109227281,1172812415521,1172812443937,1172812468507 %N A260904 Prime numbers such that sum of digits in base 16 equals product of digits in base 16. %H A260904 Chai Wah Wu, <a href="/A260904/b260904.txt">Table of n, a(n) for n = 1..6023</a> %e A260904 16673_10 = 4121_16 is prime and the sum of digits of 4121 equals the product of digits. %t A260904 Select[Prime@ Range[10^7], Total@ # == Times @@ # &@ IntegerDigits[#, 16] &] (* _Michael De Vlieger_, Nov 18 2015 *) %Y A260904 Cf. A066306. %K A260904 nonn,base %O A260904 1,1 %A A260904 _Chai Wah Wu_, Nov 17 2015