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Search: id:A104975
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| A104975 |
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Inverse of a Fredholm-Rueppel triangle. |
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+0
4
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| 1, 0, 1, -1, 0, 1, 0, -1, 0, 1, 1, 0, -1, 0, 1, 0, 1, 0, -1, 0, 1, -2, 0, 1, 0, -1, 0, 1, 0, -2, 0, 1, 0, -1, 0, 1, 3, 0, -2, 0, 1, 0, -1, 0, 1, 0, 3, 0, -2, 0, 1, 0, -1, 0, 1, -4, 0, 3, 0, -2, 0, 1, 0, -1, 0, 1, 0, -4, 0, 3, 0, -2, 0, 1, 0, -1, 0, 1, 6, 0, -4, 0, 3, 0, -2, 0, 1, 0, -1, 0, 1, 0, 6, 0, -4, 0, 3, 0, -2, 0, 1, 0, -1, 0, 1, -10, 0, 6, 0, -4, 0, 3, 0, -2
(list; table; graph; listen)
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OFFSET
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0,22
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COMMENT
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Sequence array for A104977. Inverse of A104974. Row sums are A104976.
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FORMULA
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Riordan array (x^2/(sum{k>=0, x^(2^k)}-x), x).
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EXAMPLE
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Rows start {1},{0,1},{-1,0,1},{0,-1,0,1},{1,0,-1,0,1},{0,1,0,-1,0,1},...
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CROSSREFS
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Adjacent sequences: A104972 A104973 A104974 this_sequence A104976 A104977 A104978
Sequence in context: A085854 A117145 A083912 this_sequence A106404 A083889 A127523
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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 30 2005
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