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 A231406 #18 Oct 19 2014 05:10:36 %S A231406 2,3,3,5,7,5,11,17,23,29,7,157,307,457,607,757,907,11,1536160091, %T A231406 3072320171,4608480251,6144640331,7680800411,9216960491,10753120571, %U A231406 12289280651,13825440731,15361600811,13,9918821194603,19837642389193,29756463583783,39675284778373,49594105972963,59512927167553,69431748362143,79350569556733,89269390751323,99188211945913,109107033140503,119025854335093,17,341976204789992332577 %N A231406 Table read by rows, with n-th row the smallest non-constant p-term arithmetic progression of primes beginning with p = prime(n). %C A231406 For comments, references, and links, see the crossrefs. %H A231406 Jens Kruse Andersen, <a href="/A231406/b231406.txt">Table of n, a(n) for n = 1..77</a> %H A231406 <a href="/index/Pri#primes_AP">Index entries for sequences related to primes in arithmetic progressions</a> %F A231406 T(n,k) = prime(n) + k*A088430(n), 0 <= k < prime(n), n > 0. %e A231406 Triangle begins: %e A231406 2 3 %e A231406 3 5 7 %e A231406 5 11 17 23 29 %e A231406 7 157 307 457 607 757 907 %e A231406 11 1536160091 3072320171 4608480251 6144640331 7680800411 9216960491 10753120571 12289280651 13825440731 15361600811 %Y A231406 For common differences see A088430, for initial terms see A000040, for 2nd terms see A231017, for last terms see A113834. %K A231406 hard,nonn,tabf %O A231406 1,1 %A A231406 _Jonathan Sondow_, Nov 08 2013