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 A273923 #28 Jun 20 2016 11:20:55
%S A273923 0,0,0,0,0,1,3,52
%N A273923 Number of 13-tuples of primes in arithmetic progression less than 10^n.
%D A273923 See A113827.
%e A273923 The least 13-tuple is {4943, 65003, 125063, 185123, 245183, 305243, 365303, 425363, 485423, 545483, 605543, 665603, 725663}.
%Y A273923 Cf. A113827 (prime beginning minimal n-tuple of primes in AP).
%Y A273923 Cf. A005115, A093364, A115608, A115609, A115610, A115611, A115612, A115613, A273919, A273920, A273921, A273922.
%K A273923 nonn,hard,more
%O A273923 1,7
%A A273923 _Jean-Marc Rebert_, Jun 04 2016