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A165615 Primes p such that (p^2-1)/16-p is also a prime number. 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
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
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

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Last modified April 15 04:34 EDT 2024. Contains 371667 sequences. (Running on oeis4.)