A064860 Period of continued fraction for sqrt(7)*n.

4, 4, 2, 6, 6, 4, 16, 2, 6, 16, 10, 4, 14, 32, 6, 2, 4, 16, 14, 12, 24, 10, 14, 2, 26, 24, 22, 36, 38, 12, 24, 8, 14, 8, 52, 8, 34, 32, 14, 16, 52, 32, 46, 14, 2, 14, 52, 2, 120, 64, 4, 32, 50, 44, 12, 32, 18, 34, 58, 12, 70, 52, 48, 12, 50, 18, 66, 8, 14, 96, 18, 8, 64, 42, 30, 36

Offset

1,1

Links

Robert Israel, Table of n, a(n) for n = 1..1000

Maple

f:= proc(n) uses NumberTheory;
   nops(Term(ContinuedFraction(sqrt(7)*n), periodic)[2])
end proc:
map(f, [$1..100]); # Robert Israel, Apr 14 2026

Crossrefs

Cf. A064848, A064849, A064850, A064851, A064862, A064863, A064864, A064887, A064897, A064912.

Sequence in context: A011321 A245296 A273616 * A091223 A242053 A007525

Adjacent sequences: A064857 A064858 A064859 * A064861 A064862 A064863

Keyword

nonn

Author

R. K. Guy, Oct 26 2001

Status

approved