%I #35 Aug 28 2013 06:46:13
%S 0,0,0,1,3,5,9,13,19,25,34
%N Number of crossings on periodic braids with n strands such that all strands meet.
%H Duraid Madina, <a href="/A200919/a200919_1.txt">Illustration of initial terms a(1) .. a(7)</a>
%H N. J. A. Sloane, <a href="/A200919/a200919.pdf">Illustration for a(6) = 5</a>
%K nonn,hard,nice,more
%O 1,5
%A _Duraid Madina_, Nov 24 2011
%E a(11) added by _Duraid Madina_, Oct 03 2012
%E a(7) corrected by _Duraid Madina_, Dec 11 2012