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URL: https://oeis.org/A020374

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A020374
Numbers k such that the continued fraction for sqrt(k) has period 35.
1
1061, 1237, 1289, 2197, 2297, 2657, 2753, 3277, 4033, 4073, 4138, 4181, 5393, 5834, 6373, 7241, 7577, 7753, 8186, 9298, 10081, 10217, 10834, 10853, 10858, 11338, 12577, 12785, 14393, 17258, 17837, 18433, 18709, 19898, 20281, 20749, 20765, 20858, 21349
OFFSET
1,1
LINKS
MATHEMATICA
q[k_] := Module[{c = ContinuedFraction[Sqrt[k]]}, Length[c] == 2 && Length[c[[2]]] == 35]; Select[Range[22000], q] (* Amiram Eldar, Aug 22 2025 *)
CROSSREFS
Sequence in context: A294164 A335731 A048895 * A142822 A122712 A172384
KEYWORD
nonn
STATUS
approved