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A216575 Numbers n such that the n-th Lucas number is prime and can be written in the form a^2 + 10*b^2. 0
5, 13, 17, 37, 41, 53, 61, 113, 313, 353, 613, 617, 1097, 1361, 4793, 7741, 14449, 19469, 35449, 51169, 89849, 140057, 159521, 183089, 193201, 344293, 387433, 443609, 532277, 631181, 651821 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..31.

Blair Kelly, Factorizations of Fibonacci and Lucas numbers

CROSSREFS

Cf. A000032, A001606.

Sequence in context: A211425 A245906 A191108 * A053028 A189411 A248980

Adjacent sequences:  A216572 A216573 A216574 * A216576 A216577 A216578

KEYWORD

nonn

AUTHOR

V. Raman, Sep 08 2012

STATUS

approved

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Last modified February 19 20:17 EST 2019. Contains 320328 sequences. (Running on oeis4.)