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

37, 53, 193, 373, 421, 673, 1061, 2213, 2753, 3637, 4481, 5237, 5413, 7333, 7541, 8513, 8737, 9781, 11393, 12853, 14401, 15733, 17761, 19237, 21121, 25153, 25537, 27701, 29537, 34273, 34721, 39841, 42533, 47653, 50593, 51137

Offset: 1

Author

Chai Wah Wu, Jul 10 2014

Keywords

• nonn

Comments

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

Links

• Chai Wah Wu, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A154616, A002327, A066436.

Programs

Python

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