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A062361
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Number of triangular regions in regular n-gon with all diagonals drawn.
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19
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1, 4, 10, 18, 35, 56, 90, 120, 176, 276, 377, 476, 585, 848, 1054, 1404, 1653, 2200, 2268, 2992, 3749, 4416, 5000, 6292, 6777, 8316, 9222, 11670, 11501, 14368, 15840, 18598, 19705, 24444, 25012, 28842, 30966, 36000, 39278, 45318, 46999, 53900
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OFFSET
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3,2
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COMMENTS
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Also the number of 3-cycles and maximum cliques in the n-polygon diagonal intersection graph. - Eric W. Weisstein, Mar 08-09 2018
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LINKS
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FORMULA
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EXAMPLE
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a(4) = 4 because in a quadrilateral the diagonals cross to make four triangles.
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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