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 A146357 #12 Mar 30 2020 08:41:43 %S A146357 103,127,239,263,479,887,1567,2711,5743,5903,8311,8447,10567,10847, %T A146357 12391,14783,14831,15887,18191,22343,23447,28151,31391,32359,40087, %U A146357 40343,42703,53407,60103,60623,64231,75431,79943,81559,83663,93503,114167,130199,135119,141863 %N A146357 Primes p such that continued fraction of (1 + sqrt(p))/2 has period 12 : primes in A146336. %H A146357 Amiram Eldar, <a href="/A146357/b146357.txt">Table of n, a(n) for n = 1..1000</a> %t A146357 Select[Prime[Range[10000]],Length[ContinuedFraction[(1+Sqrt[#])/2][[2]]] == 12&] (* _Harvey P. Dale_, May 18 2017 *) %Y A146357 Cf. A000290, A050950-A050969, A078370, A146326-A146345, A146348-A146360. %K A146357 nonn %O A146357 1,1 %A A146357 _Artur Jasinski_, Oct 30 2008 %E A146357 Period length in definition corrected, 103 added, 607 and 2063 removed. - _R. J. Mathar_, Nov 08 2008 %E A146357 More terms from _Amiram Eldar_, Mar 30 2020