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 A281448 #34 Jan 28 2017 15:31:07 %S A281448 113575727,232728647,2426256797,2469604721,3344410367,4656098957, %T A281448 4952808461,6369321857,6430890287,6760087151,8518049207,10818813737, %U A281448 13195845317,19684555061,21884908931,23953276661,25509639137,26367829331,26390212061,31004257211 %N A281448 Initial primes of 9 consecutive primes with consecutive gaps 2, 4, 6, 8, 10, 12, 14, 16. %H A281448 Charles R Greathouse IV, <a href="/A281448/b281448.txt">Table of n, a(n) for n = 1..174</a> %t A281448 Select[Partition[Prime[Range[20*10^7]], 9, 1], Differences[#] == 2*Range[8] &][[All, 1]] %o A281448 (PARI) g=0; p=2; forprime(q=3,, if(q-p==g+2, g+=2; if(g==16, print1(q-72", "); g=0), g=0); p=q) \\ _Charles R Greathouse IV_, Jan 28 2017 %Y A281448 Cf. A078847, A190814, A190817, A190819, A190838. %K A281448 nonn %O A281448 1,1 %A A281448 _Harvey P. Dale_, Jan 27 2017 %E A281448 a(10)-a(20) from _Charles R Greathouse IV_, Jan 28 2017