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 A061558 #35 Jun 30 2025 14:38:12 %S A061558 0,1,2,6,6,30,150,1210230,32671170,224494620,1536160080,1482708889200, %T A061558 9918821194590,266029822978920,266029822978920,11358256064006271420, %U A061558 341976204789992332560,128642760444772214170530,2166703103992332274919550 %N A061558 The smallest difference of an increasing arithmetic progression of n primes with the minimal possible first term (A007918(n)). %C A061558 Apart from the initial term, does this sequence coincide with A113461? - _N. J. A. Sloane_, Sep 22 2007 %H A061558 Jens Kruse Andersen, <a href="http://primerecords.dk/aprecords.htm">Records for primes in arithmetic progression</a> %H A061558 Jaroslaw Wroblewski, <a href="http://groups.yahoo.com/group/primenumbers/message/25033">Re: AP19 starting with 19</a>, Yahoo group "primenumbers", Apr 10 2013. %H A061558 Jaroslaw Wroblewski, Mike Oakes, Jens Kruse Andersen, <a href="/A061558/a061558.txt">AP19 starting with 19</a>, digest of 6 messages in primenumbers Yahoo group, Feb 25 - Apr 10, 2013. %H A061558 <a href="/index/Pri#primes_AP">Index entries for sequences related to primes in arithmetic progressions</a> %e A061558 For n = 10, the smallest difference a(10) = 224494620 with the first term 11 (= A007918(10)) producing an arithmetic progression of 10 primes. %Y A061558 Cf. A007918 (initial terms), A120302 (last terms), A130791 (triangle). %K A061558 nonn,hard %O A061558 1,3 %A A061558 _Gennady Gusev_, May 17 2001 %E A061558 a(16) and a(17) from P. Carmody. - _Gennady Gusev_, Oct 07 2005 %E A061558 a(0) deleted by _N. J. A. Sloane_, Sep 22 2007 %E A061558 a(18) from _Gennady Gusev_, Oct 31 2012 %E A061558 a(19) from _Wojciech Izykowski_, Apr 11 2013