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A216564
Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + 2*b^2.
0
7, 19, 31, 79, 5851, 8467, 13963, 574219
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..8.
Blair Kelly,
Factorizations of Fibonacci and Lucas numbers
CROSSREFS
Cf.
A000032
,
A001606
.
Sequence in context:
A141338
A237366
A216531
*
A145042
A153892
A338410
Adjacent sequences:
A216561
A216562
A216563
*
A216565
A216566
A216567
KEYWORD
nonn
AUTHOR
V. Raman
, Sep 08 2012
STATUS
approved
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Last modified May 17 18:28 EDT 2024. Contains 372603 sequences. (Running on oeis4.)
