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A161426
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Y-toothpick sequence starting at the outside corner of an infinite triangle-shaped polygon as the sieve of A160120 after 2^k rounds.
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2
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0, 1, 4, 7, 14, 19, 26, 35, 52, 63, 70
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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COMMENTS
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The sequence gives the number of Y-toothpicks after n rounds. A161427 (the first differences) gives the number added at the n-th round.
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LINKS
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CROSSREFS
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KEYWORD
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more,nonn
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AUTHOR
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STATUS
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approved
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