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 A228119 #21 Aug 14 2013 12:23:58 %S A228119 1,2,4,6,16,21,22,23,24,25,26,27,28,29,32,34,42,52,61,65,66,69,72,83, %T A228119 84,86,92,98,114,123,134,138,161,165,169,176,186,192,213,216,219,222, %U A228119 223,228,239,249,253,256,258,259,265,273,286,289,292,293,294,297 %N A228119 Numbers n such that n * (product of digits of n) + 1 is prime. %H A228119 Jayanta Basu, <a href="/A228119/b228119.txt">Table of n, a(n) for n = 1..10000</a> %e A228119 16 is a member since 16 * (product of digits of 16) + 1 = 16*6 + 1 = 97 is a prime. %t A228119 Select[Range[300], PrimeQ[(#*Times @@ IntegerDigits[#]) + 1] &] %Y A228119 Cf. A000040, A007954. %K A228119 nonn,base %O A228119 1,2 %A A228119 _Jayanta Basu_, Aug 14 2013