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Search: id:A122917
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| A122917 |
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Riordan array (1/(1+x+x^2),x/(1+x)^2). |
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+0
3
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| 1, -1, 1, 0, -3, 1, 1, 5, -5, 1, -1, -6, 14, -7, 1, 0, 6, -29, 27, -9, 1, 1, -6, 50, -76, 44, -11, 1, -1, 7, -77, 175, -155, 65, -13, 1, 0, -9, 111, -351, 441, -274, 90, -15, 1, 1, 11, -154, 638, -1078, 924, -441
(list; table; graph; listen)
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OFFSET
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0,5
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COMMENT
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Row sums are A122918. Inverse is A122919.
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EXAMPLE
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Triangle begins
1,
-1, 1,
0, -3, 1,
1, 5, -5, 1,
-1, -6, 14, -7, 1,
0, 6, -29, 27, -9, 1,
1, -6, 50, -76, 44, -11, 1,
-1, 7, -77, 175, -155, 65, -13, 1
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CROSSREFS
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Sequence in context: A131767 A026780 A026703 this_sequence A096583 A130154 A134398
Adjacent sequences: A122914 A122915 A122916 this_sequence A122918 A122919 A122920
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KEYWORD
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easy,sign,tabl
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Sep 19 2006
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