OFFSET
1,2
COMMENTS
Maximum number of boat shapes formed from six equilateral triangles that can be placed in an equilateral triangle of order a(n+4). - Craig Knecht, Sep 13 2017
LINKS
EXAMPLE
a(11) <= 29 because i = 20 and j = 9 in the following graph:
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X X X - - X X X
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a(11) <= 29 because i = 16 and j = 13 in the following graph:
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X X - - -
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CROSSREFS
KEYWORD
nonn,more
AUTHOR
Gordon Hamilton, Jun 03 2014
STATUS
approved