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A031579
Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 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
OFFSET
1,1
CROSSREFS
Sequence in context: A017564 A352036 A321812 * A288884 A031759 A145050
KEYWORD
nonn
STATUS
approved