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%I #8 Feb 02 2014 10:58:40
%S 1,0,6,8,120,0,5040,4608,362880,0,39916800
%N Number of irregular spirals (non-expanded loop) appearing with n center points.
%C See A236535 for construction rule.
%C Conjecture: (1) For odd n all forms are non-expanded loops and equal to n!. (2) For n mod 4 = 0, there are both non-expanded loops and expanded spirals.
%H Kival Ngaokrajang, <a href="/A236754/a236754.pdf">Illustration of irregular spirals, center points = 1..6</a>
%H Kival Ngaokrajang, <a href="/A236754/a236754.txt">Small Basic program</a>
%Y Cf. A014105 (2 center points); A234902, A234903, A234904, A236535 (3 center points); A235088, A235089 (4 center points); A236326, A236327 (5 center points).
%K nonn,more
%O 1,3
%A _Kival Ngaokrajang_, Jan 30 2014
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