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A124802
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Triangle, row sums = Fibonacci numbers in two ways, companion to A124801.
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1
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1, 1, 1, 1, 3, -1, 1, 6, -4, 2, 1, 10, -10, 10, -3, 1, 15, -20, 30, -18, 5, 1, 21, -35, 70, -63, 35, -8, 1, 28, -56, 140, -168, 140, -64, 13
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OFFSET
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2,5
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COMMENTS
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Row sums (signed) = Fn; row sums unsigned = F(2n-3).
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LINKS
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FORMULA
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Delete the "zero" column of A124801.
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EXAMPLE
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First few rows of the triangle are:
1;
1, 1;
1, 3, -1;
1, 6, -4, 2;
1, 10, -10, 10, -3;
1, 15, -20, 30, -18, 5;
1, 21, -35, 70, -63, 35, -8;
1, 28, -56, 140, -168, 140, -64, 13;
Example: row 7 signed = F7 = 13 = (1 + 15 - 20 + 30 - 18 + 5).
Row 7 unsigned = F(2n+3) = F11 = (1 + 15 + 20 + 30 + 18 + 5)
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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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