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 A089257 #8 Nov 21 2013 12:48:15
%S A089257 4,6,8,12,14,18,24,26,32,36,38,42,44,54,56,66,68,72,78,84,86,92,98,
%T A089257 102,108,114,116,122,128,134,138,144,156,158,168,176,182,186,192,194,
%U A089257 212,218,222,224,234,236,242,246,248,252,254,264,276,284,288,296,302,306
%N A089257 Even numbers n such that 2n-5 is a prime of the form 4k+3.
%D A089257 M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988
%D A089257 Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997
%H A089257 Harvey P. Dale, <a href="/A089257/b089257.txt">Table of n, a(n) for n = 1..1000</a>
%t A089257 pf4kQ[n_]:=Module[{c=2n-5},PrimeQ[c]&&IntegerQ[(c-3)/4]]; Select[Range[ 2,400,2],pf4kQ] (* _Harvey P. Dale_, Oct 22 2011 *)
%Y A089257 Cf. A002145.
%K A089257 easy,nonn
%O A089257 1,1
%A A089257 _Giovanni Teofilatto_, Dec 12 2003
%E A089257 More terms from _R. J. Mathar_, Apr 22 2010