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Search: id:A109264
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| A109264 |
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Riordan array (1-x-x^2,x(1-x)). |
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+0
2
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| 1, -1, 1, -1, -2, 1, 0, 0, -3, 1, 0, 1, 2, -4, 1, 0, 0, 1, 5, -5, 1, 0, 0, -1, -1, 9, -6, 1, 0, 0, 0, -2, -6, 14, -7, 1, 0, 0, 0, 1, -1, -15, 20, -8, 1, 0, 0, 0, 0, 3, 5, -29, 27, -9, 1, 0, 0, 0, 0, -1, 4, 20, -49, 35, -10, 1, 0, 0, 0, 0, 0, -4, -1, 49, -76, 44, -11, 1, 0, 0, 0, 0, 0, 1, -8, -21, 98, -111, 54, -12, 1
(list; table; graph; listen)
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OFFSET
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0,5
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COMMENT
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Rows sums are A109265. Diagonal sums are A109266. Inverse is A109267.
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EXAMPLE
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Rows begin
1;
-1,1;
-1,-2,1;
0,0,-3,1;
0,1,2,-4,1;
0,0,1,5,-5,1;
0,0,-1,-1,9,-6,1;
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CROSSREFS
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Adjacent sequences: A109261 A109262 A109263 this_sequence A109265 A109266 A109267
Sequence in context: A029371 A114374 A111505 this_sequence A130507 A037872 A037854
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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), Jun 24 2005
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