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A031663
Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 75.
0
69218, 114325, 116362, 171517, 173177, 238313, 242233, 317194, 320581, 322849, 409889, 510157, 513017, 515885, 518761, 621385, 624541, 634057, 748754, 757429, 760913, 762658, 882346, 886106, 887989, 895541, 1037053, 1184585
OFFSET
1,1
CROSSREFS
Sequence in context: A354194 A096551 A096552 * A105010 A190379 A205758
KEYWORD
nonn
EXTENSIONS
First term 5626 removed by Georg Fischer, Jun 16 2019
STATUS
approved