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Primes p such that continued fraction of (1 + sqrt(p))/2 has period 12 : primes in A146336.
3

%I #12 Mar 30 2020 08:41:43

%S 103,127,239,263,479,887,1567,2711,5743,5903,8311,8447,10567,10847,

%T 12391,14783,14831,15887,18191,22343,23447,28151,31391,32359,40087,

%U 40343,42703,53407,60103,60623,64231,75431,79943,81559,83663,93503,114167,130199,135119,141863

%N Primes p such that continued fraction of (1 + sqrt(p))/2 has period 12 : primes in A146336.

%H Amiram Eldar, <a href="/A146357/b146357.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Prime[Range[10000]],Length[ContinuedFraction[(1+Sqrt[#])/2][[2]]] == 12&] (* _Harvey P. Dale_, May 18 2017 *)

%Y Cf. A000290, A050950-A050969, A078370, A146326-A146345, A146348-A146360.

%K nonn

%O 1,1

%A _Artur Jasinski_, Oct 30 2008

%E Period length in definition corrected, 103 added, 607 and 2063 removed. - _R. J. Mathar_, Nov 08 2008

%E More terms from _Amiram Eldar_, Mar 30 2020