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A093343 Primes of form (prime(n)^2 + prime(n+1)^2)/2. 7
17, 37, 229, 2029, 14449, 22501, 25609, 28909, 32401, 42061, 57601, 72901, 116989, 176401, 181501, 265261, 304729, 324901, 378229, 462409, 497041, 695581, 804709, 1089961, 1299721, 1416109, 1664101, 1742401, 1932181, 1971241, 2712709, 2873029, 3062509, 3186229 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Except for the first term, all terms == 1 mod 6. [Zak Seidov, Dec 02 2009]

Except 17, all terms == 1 mod 12. Primes of the form A028334(n+1)^2 + A024675(n)^2. - Thomas Ordowski, Jun 28 2013

LINKS

Zak Seidov, Table of n, a(n) for n=1..1000

FORMULA

Conjecture: a(n) ~ A224888(n). - Thomas Ordowski, Jul 25 2013

CROSSREFS

Cf. A103739.

Sequence in context: A154301 A057185 A157467 * A153685 A208292 A121710

Adjacent sequences:  A093340 A093341 A093342 * A093344 A093345 A093346

KEYWORD

nonn

AUTHOR

Giovanni Teofilatto, Apr 26 2004

EXTENSIONS

Corrected and extended by Rick L. Shepherd, Nov 24 2004

STATUS

approved

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Last modified May 13 23:41 EDT 2021. Contains 343868 sequences. (Running on oeis4.)