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A139361 Primes A080478(n)^2 + A080478(n+1)^2. 2
5, 13, 73, 233, 569, 929, 1429, 1861, 2897, 4337, 7877, 11717, 12641, 14321, 17137, 19417, 21017, 21841, 24481, 27617, 29537, 32537, 35117, 37277, 38921, 41801, 44701, 47149, 49613, 52189, 56809, 59513, 61613, 65173, 74293, 82013, 94109 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The construction of A080478 requires that certain numbers "k^2 + a(n-1)^2" be prime - the present sequence lists these primes. - N. J. A. Sloane, Jun 24 2012

All primes are of the form 4m+1, corresponding m's 1, 3, 18, 58, 142, 232, 357, 465, 724 in A139362.

LINKS

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

CROSSREFS

Cf. A080478, A139362.

Sequence in context: A068487 A075063 A100209 * A115329 A272645 A137702

Adjacent sequences:  A139358 A139359 A139360 * A139362 A139363 A139364

KEYWORD

nonn

AUTHOR

Zak Seidov, Apr 15 2008

STATUS

approved

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Last modified March 28 07:54 EDT 2017. Contains 284182 sequences.