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A255894
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Polyiamond Family Planners: a(n) is the least number of children of a polyiamond of size n.
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1
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1, 1, 1, 3, 1, 3, 1, 3, 2, 2, 2, 5, 1, 3
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OFFSET
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0,4
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LINKS
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EXAMPLE
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a(7) = 3 because the 7-triangle polyiamond
____________
\ /\
\ / \
\ / \ a
\ / \
\ / \ b
\/__________\___________
/\ /\ /
/ \ / \ /
/ \ / \ /
/ \ / \ / c
/ \ / \ /
/__________\/__________\/
\ /
\ /
\ /
\ /
\ /
\/
has three 8-triangle children created by adding a triangle to position a, b or c.
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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