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A255894 Polyiamond Family Planners: a(n) is the least number of children of a polyiamond of size n.

%I A255894 #8 Mar 10 2015 02:16:29
%S A255894 1,1,1,3,1,3,1,3,2,2,2,5,1,3
%N A255894 Polyiamond Family Planners: a(n) is the least number of children of a polyiamond of size n.
%e A255894 a(7) = 3 because the 7-triangle polyiamond
%e A255894   ____________
%e A255894   \          /\
%e A255894    \        /  \
%e A255894     \      /    \  a
%e A255894      \    /      \
%e A255894       \  /        \      b
%e A255894        \/__________\___________
%e A255894        /\          /\          /
%e A255894       /  \        /  \        /
%e A255894      /    \      /    \      /
%e A255894     /      \    /      \    /  c
%e A255894    /        \  /        \  /
%e A255894   /__________\/__________\/
%e A255894   \          /
%e A255894    \        /
%e A255894     \      /
%e A255894      \    /
%e A255894       \  /
%e A255894        \/
%e A255894 has three 8-triangle children created by adding a triangle to position a, b or c.
%Y A255894 Cf. A000577, A255890.
%K A255894 nonn,more
%O A255894 0,4
%A A255894 _Gordon Hamilton_, Mar 09 2015