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 A186647 #10 Oct 05 2019 08:45:03 %S A186647 2,12,14,16,20,30,32,34,38,50,52,56,58,70,74,76,92,94,98,102,104,106, %T A186647 110,120,122,124,128,140,142,146,148,160,164,166,182,184,188,200,210, %U A186647 212,214,218,230,232 %N A186647 Even numbers whose decimal digits sum to a prime. %H A186647 Harvey P. Dale, <a href="/A186647/b186647.txt">Table of n, a(n) for n = 1..1000</a> %t A186647 Select[2*Range[0,200],PrimeQ[Total[IntegerDigits[#]]]&] (* _Harvey P. Dale_, Oct 05 2019 *) %Y A186647 Cf. A119449. %K A186647 nonn,easy,base %O A186647 1,1 %A A186647 _Giovanni Teofilatto_, Feb 25 2011