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 A033188 #26 Feb 16 2025 08:32:36 %S A033188 0,1,2,6,6,30,150,210,210,210,2310,2310,30030,30030,30030,30030, %T A033188 510510,510510,9699690,9699690,9699690 %N A033188 Minimal difference of any increasing arithmetic progression of n primes. %C A033188 The entries shown have been proved to be correct. %H A033188 Jens Kruse Andersen, <a href="http://primerecords.dk/aprecords.htm#minimal">Status of minimal arithmetic progressions of primes</a> %H A033188 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PrimeArithmeticProgression.html">Prime Arithmetic Progression.</a> %H A033188 <a href="/index/Pri#primes_AP">Index entries for sequences related to primes in arithmetic progressions</a> %F A033188 David W. Wilson conjectures that a(n) = n# (n primorial, A034386) for n >= 8. If this is true then a(22) onwards are: 9699690, 223092870, 223092870, 223092870, 223092870, 223092870, 223092870, 6469693230, 6469693230, ... %Y A033188 Cf. A033189 (initial terms), A113872 (last terms). %Y A033188 Cf. A034386, A204189. %K A033188 nonn,hard %O A033188 1,3 %A A033188 _Eric W. Weisstein_ %E A033188 Entry revised Feb 02 2006 by _N. J. A. Sloane_, based on suggestions from Jens Kruse Andersen.