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A129685
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Exponential Riordan array [1-x^2/2, x].
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1
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1, 0, 1, -1, 0, 1, 0, -3, 0, 1, 0, 0, -6, 0, 1, 0, 0, 0, -10, 0, 1, 0, 0, 0, 0, -15, 0, 1, 0, 0, 0, 0, 0, -21, 0, 1, 0, 0, 0, 0, 0, 0, -28, 0, 1, 0, 0, 0, 0, 0, 0, 0, -36, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, -45, 0, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,8
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COMMENTS
| Inverse of A129684. Row sums are A080956.
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EXAMPLE
| Triangle begins
1,
0, 1,
-1, 0, 1,
0, -3, 0, 1,
0, 0, -6, 0, 1,
0, 0, 0, -10, 0, 1,
0, 0, 0, 0, -15, 0, 1,
0, 0, 0, 0, 0, -21, 0, 1,
0, 0, 0, 0, 0, 0, -28, 0, 1,
0, 0, 0, 0, 0, 0, 0, -36, 0, 1,
0, 0, 0, 0, 0, 0, 0, 0, -45, 0, 1
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CROSSREFS
| Sequence in context: A051830 A106216 A035676 * A140807 A091959 A046094
Adjacent sequences: A129682 A129683 A129684 * A129686 A129687 A129688
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KEYWORD
| easy,sign,tabl
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Apr 28 2007
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