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A242930 Primes of the form (k^2+7)/11. 1

%I #32 Jul 13 2014 10:18:16

%S 37,53,193,373,421,673,1061,2213,2753,3637,4481,5237,5413,7333,7541,

%T 8513,8737,9781,11393,12853,14401,15733,17761,19237,21121,25153,25537,

%U 27701,29537,34273,34721,39841,42533,47653,50593,51137

%N Primes of the form (k^2+7)/11.

%C Also equal to primes p such that 11*p-7 is a perfect square.

%H Chai Wah Wu, <a href="/A242930/b242930.txt">Table of n, a(n) for n = 1..1000</a>

%o (Python)

%o import sympy

%o [(k**2+7)/11 for k in range(10**6) if sympy.ntheory.isprime((k**2+7)/11) & ((k**2+7)/11).is_integer()]

%Y Cf. A154616, A002327, A066436.

%K nonn

%O 1,1

%A _Chai Wah Wu_, Jul 10 2014

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Last modified April 25 16:45 EDT 2024. Contains 371989 sequences. (Running on oeis4.)