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A031579 Numbers n such that continued fraction for sqrt(n) has even period and central term 81. 0
6563, 6571, 6599, 6607, 6611, 6619, 6647, 6651, 6659, 6667, 6679, 6691, 6703, 6719, 6727, 6763, 6779, 6791, 6803, 6819, 6823, 6827, 6847, 6859, 6863, 6871, 6883, 6887, 26248, 26272, 26304, 26344, 26408, 26432, 26440, 26464, 26496, 26504, 26528, 26592 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..40.

CROSSREFS

Sequence in context: A017432 A017564 A321812 * A288884 A031759 A145050

Adjacent sequences:  A031576 A031577 A031578 * A031580 A031581 A031582

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified November 15 08:58 EST 2019. Contains 329144 sequences. (Running on oeis4.)