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 A273920 #14 Jun 09 2016 04:33:39
%S A273920 0,0,0,1,5,145,2969
%N A273920 Number of 10-tuples of primes in arithmetic progression less than 10^n.
%D A273920 See A113827.
%e A273920 The least 10-tuple is {199, 409, 619, 829, 1039, 1249, 1459, 1669, 1879, 2089}, which explains a(4)=1 (and a(n)=0 for n<4).
%Y A273920 Cf. A113827 (prime beginning minimal n-tuple of primes in AP).
%Y A273920 Cf. A005115, A115608, A115609, A115610, A115611, A115612, A115613, A273919, A273921, A273922, A273923.
%K A273920 nonn,hard,more
%O A273920 1,5
%A A273920 _Jean-Marc Rebert_, Jun 04 2016