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A260805 Primes p such that p = q^2 - 2*r^2 where q and r are also primes. 5
17, 31, 41, 71, 103, 113, 151, 191, 239, 263, 271, 281, 311, 353, 431, 479, 503, 521, 599, 719, 743, 823, 863, 911, 953, 1031, 1103, 1151, 1319, 1361, 1439, 1487, 1511, 1583, 1607, 1663, 1831, 1871, 2039, 2087, 2111, 2423, 2663, 2711, 2791, 2801, 2903, 2999 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Colin Barker, Table of n, a(n) for n = 1..1000

EXAMPLE

71 is in the sequence because 71 = 11^2 - 2*5^2 and 71, 11 and 5 are all primes.

CROSSREFS

Cf. A260806, A260807, A260808, A260809.

Sequence in context: A258029 A321596 A160961 * A267781 A270441 A256374

Adjacent sequences:  A260802 A260803 A260804 * A260806 A260807 A260808

KEYWORD

nonn

AUTHOR

Colin Barker, Jul 31 2015

STATUS

approved

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Last modified August 9 04:17 EDT 2020. Contains 336319 sequences. (Running on oeis4.)