This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A064851 #8 Feb 10 2016 13:35:16 %S A064851 2,2,6,4,2,6,6,8,2,2,4,12,16,6,12,12,22,2,18,2,24,4,20,20,18,12,10,8, %T A064851 22,8,26,32,4,14,8,8,40,10,40,4,34,16,38,8,8,16,40,44,2,14,10,24,50, %U A064851 10,12,4,18,22,22,8,56,26,20,60,32,4,58,24,60,4,68,20,34,40,58,24,28,44 %N A064851 Period of continued fraction for sqrt(6)*n. %e A064851 A040003 (cfrac for n=1) has period length 2, so a(1)=2. A040019 (cfrac for n=2) has period length 2, so a(2)=2. A010140 (cfrac for n=3) has period length 6, so a(3)=6. - _R. J. Mathar_, Feb 10 2016 %K A064851 nonn %O A064851 1,1 %A A064851 _R. K. Guy_, Oct 26 2001