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A173257 Pell sequence entry points for primes == 1 (mod 4). 1
3, 7, 8, 5, 19, 10, 27, 31, 36, 44, 48, 51, 55, 28, 17, 75, 79, 87, 91, 96, 9, 23, 116, 40, 64, 15, 139, 140, 49, 78, 159, 28, 175, 22, 187, 39, 199, 200, 102, 211, 216, 224, 114, 231, 255, 65, 271, 279, 71, 16 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

R. J. Mathar, Table of n, a(n) for n = 1..1000

Neville Robbins, On Pell numbers of the form p*X^2, where p is prime, Fib Quart. 22 (4) (1984) 340, Table 2.

FORMULA

a(n) = A214028(A002144(n)).

MAPLE

A173257 := proc(n)

        A214028(A002144(n)) ;

end proc:

seq(A173257(n), n=1..50) ;

CROSSREFS

Sequence in context: A064540 A264826 A199712 * A103560 A198562 A244334

Adjacent sequences:  A173254 A173255 A173256 * A173258 A173259 A173260

KEYWORD

nonn,easy

AUTHOR

R. J. Mathar, Jul 07 2012

STATUS

approved

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Last modified May 24 17:30 EDT 2017. Contains 286997 sequences.