A165615 Primes p such that (p^2-1)/16-p is also a prime number.

31, 79, 97, 127, 191, 239, 241, 337, 401, 577, 751, 769, 881, 1039, 1151, 1231, 1297, 1471, 1487, 1567, 1759, 1777, 1871, 2207, 2591, 2687, 2719, 2767, 2897, 2927, 3041, 3391, 3919, 4159, 4271, 4481, 4591, 4721, 4817, 5231, 5279, 5407, 5711, 6257, 6337

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Example

For p=31, (31^2-1)/16-31=29 = A165615(1). For p=79, (79^2-1)/16 -79=311 = A165616(2).

Mathematica

Select[Prime[Range[1000]], PrimeQ[(#^2-1)/16-# ]&] [Harvey P. Dale, Oct 02 2009]

Crossrefs

Cf. A165616.

Sequence in context: A068917 A317053 A009408 * A142408 A246929 A033220

Adjacent sequences: A165612 A165613 A165614 * A165616 A165617 A165618

Keyword

nonn,easy

Author

Vincenzo Librandi, Sep 22 2009

Extensions

Sequence corrected, missing terms added, additional terms added Harvey P. Dale, Oct 02 2009

Status

approved