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Search: id:A115452
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| A115452 |
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A Fredholm-Rueppel related triangle. |
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+0
2
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| 1, 2, -1, 2, -3, 1, 2, -3, 3, -1, 0, 0, 2, -3, 1, -2, 3, -1, -2, 3, -1, 0, 0, 0, 0, 2, -3, 1, 2, -3, 3, -1, 0, -2, 3, -1, 0, 0, 0, 0, 0, 0, 2, -3, 1, 0, 0, -2, 3, -1, 0, 0, -2, 3, -1, 0, 0, 0, 0, 0, 0, 0, 0, 2, -3, 1, -2, 3, -1, -2, 3, -1, 0, 0, 0, -2, 3, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, -3, 1
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Inverse of A115450. Row sums are Fredholm-Rueppel sequence A036987.
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FORMULA
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Inverse of (1/((1-x)(1-2x)), -x)-(x/((1-x)(1-2x)), -x^2) (expressed in the notation of Riordan arrays).
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EXAMPLE
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Triangle begins
1,
2, -1,
2, -3, 1,
2, -3, 3, -1,
0, 0, 2, -3, 1,
-2, 3, -1, -2, 3, -1,
0, 0, 0, 0, 2, -3, 1,
2, -3, 3, -1, 0, -2, 3, -1,
0, 0, 0, 0, 0, 0, 2, -3, 1,
0, 0, -2, 3, -1, 0, 0, -2, 3, -1,
0, 0, 0, 0, 0, 0, 0, 0, 2, -3, 1,
-2, 3, -1, -2, 3, -1, 0, 0, 0, -2, 3, -1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, -3, 1
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CROSSREFS
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Adjacent sequences: A115449 A115450 A115451 this_sequence A115453 A115454 A115455
Sequence in context: A023115 A061336 A057945 this_sequence A039676 A113126 A138060
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KEYWORD
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sign,tabl
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Jan 22 2006
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