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A031571
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 73.
0
5331, 5339, 5347, 5351, 5371, 5383, 5387, 5399, 5407, 5419, 5427, 5431, 5443, 5471, 5479, 5483, 5503, 5507, 5519, 5527, 5531, 5543, 5563, 5571, 5591, 5623, 21320, 21376, 21408, 21416, 21472, 21504, 21536, 21544, 21632, 21640, 21664, 21696, 21704, 21760
OFFSET
1,1
CROSSREFS
Sequence in context: A236274 A278895 A317918 * A031751 A023342 A050814
KEYWORD
nonn
STATUS
approved