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A332372
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Consider a partition of the plane (a_1,a_2) in R X R by the lines a_1*x_1 + a_2*x_2 = 1 for 0 <= x_1 <= m-1, 1 <= x_2 <= 1-1. The cells are (generalized) triangles and quadrilaterals. Triangle read by rows: T(m,n) = total number of edges in the partition for m >= n >= 2.
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5
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9, 20, 43, 35, 77, 139, 54, 118, 213, 327, 77, 170, 310, 479, 703, 104, 229, 417, 642, 941, 1259, 135, 299, 546, 842, 1236, 1657, 2183, 170, 376, 688, 1062, 1561, 2094, 2759, 3487, 209, 464, 850, 1313, 1933, 2594, 3418, 4321, 5355, 252, 559, 1024, 1581, 2327, 3118, 4107, 5190, 6431, 7723
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OFFSET
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2,1
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LINKS
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EXAMPLE
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Triangle begins:
9,
20, 43,
35, 77, 139,
54, 118, 213, 327,
77, 170, 310, 479, 703,
104, 229, 417, 642, 941, 1259,
135, 299, 546, 842, 1236, 1657, 2183,
170, 376, 688, 1062, 1561, 2094, 2759, 3487,
209, 464, 850, 1313, 1933, 2594, 3418, 4321, 5355,
...
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MAPLE
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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