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Search: id:A117354
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| A117354 |
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Riordan array (1-x+sqrt(1-6x+x^2))/2, (1+x-sqrt(1-6x+x^2))/4). |
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+0
2
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| 1, -2, 1, -2, -1, 1, -6, -1, 0, 1, -22, -3, 1, 1, 1, -90, -11, 4, 4, 2, 1, -394, -45, 17, 16, 8, 3, 1, -1806, -197, 76, 69, 34, 13, 4, 1, -8558, -903, 353, 313, 153, 59, 19, 5, 1, -41586, -4279, 1688, 1472, 716, 278, 92, 26, 6, 1, -206098, -20793, 8257, 7112, 3448, 1346, 454, 134, 34
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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First column is A085403. Row sums are A086456. Inverse of A117352.
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EXAMPLE
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Triangle begins
1,
-2, 1,
-2, -1, 1,
-6, -1, 0, 1,
-22, -3, 1, 1, 1,
-90, -11, 4, 4, 2, 1,
-394, -45, 17, 16, 8, 3, 1
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CROSSREFS
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Sequence in context: A003417 A158986 A079900 this_sequence A140324 A010250 A060024
Adjacent sequences: A117351 A117352 A117353 this_sequence A117355 A117356 A117357
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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), Mar 09 2006
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