A064913 - OEIS

%I #6 Sep 21 2019 11:45:13

%S 6,12,2,12,10,8,22,20,10,10,12,8,4,12,12,40,6,28,90,10,24,28,22,24,46,

%T 4,46,12,72,8,8,72,14,6,20,24,92,172,2,12,94,20,50,28,24,18,130,32,

%U 134,38,6,8,140,84,32,16,102,152,130,8,134,24,60,160,4,24,146,6,18,12,172

%N Period of continued fraction for sqrt(19)*n.

%t Table[Length[ContinuedFraction[n Sqrt[19]][[2]]],{n,80}] (* _Harvey P. Dale_, Sep 21 2019 *)

%K nonn

%O 1,1

%A _R. K. Guy_, Oct 26, 2001