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 A264577 #7 Nov 18 2015 11:38:44 %S A264577 2,3,617,677,5593513,5597797,5608873,5609113,5609833,5659237,5662297, %T A264577 5662357,5678437,5854633,5855833,5871013,5871961,5871973,5872213, %U A264577 5875033,5876053,5920357,5921173,5924437,5937493,6646357,6658453,6661477,6706537,6706597,6707557 %N A264577 Prime numbers such that sum of digits in base 4 equals product of digits in base 4. %H A264577 Chai Wah Wu, <a href="/A264577/b264577.txt">Table of n, a(n) for n = 1..10000</a> %e A264577 5593513_10 = 111111212221_4 is prime and the sum of digits of 111111212221 is equal to the product of digits. %t A264577 Select[Prime@ Range[10^6], Total@ # == Times @@ # &@ IntegerDigits[#, 4] &] (* _Michael De Vlieger_, Nov 18 2015 *) %Y A264577 Cf. A066306. %K A264577 nonn,base %O A264577 1,1 %A A264577 _Chai Wah Wu_, Nov 17 2015