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 A023187 #26 Oct 04 2015 03:48:54
%S A023187 1,2,4,6,12,14,18,20,24,30,40,42,44,48,54,62,72,76,96,98,108,116,124,
%T A023187 136,156,160,162,168,174,176,178,180,186,194,210,214,222,242,244,246,
%U A023187 250,258,268,284,300,324,328,340,348,352,390,396,420,432,452,480
%N A023187 Distances of increasingly lonely primes to nearest prime.
%C A023187 These are the distances mentioned in A023186.
%e A023187 The nearest prime to 23 is 4 units away, larger than any previous prime, so 4 is in the sequence.
%t A023187 t={}; max=p=0; q=2; Do[r=NextPrime[q]; If[(min=Min[q-p,r-q])>max, max=min; AppendTo[t,max]]; p=q; q=r, {n,828000}]; t (* _Jayanta Basu_, May 18 2013 *)
%Y A023187 Related sequences: A023186-A023188, A046929-A046931, A051650, A051652, A051697-A051702, A051728-A051730.
%K A023187 nonn
%O A023187 1,2
%A A023187 _David W. Wilson_
%E A023187 More terms from _Jud McCranie_, Jun 16 2000
%E A023187 More terms from _T. D. Noe_, Jul 21 2006
%E A023187 More terms from _Dmitry Petukhov_, Oct 03 2015