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A120111
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Bi-diagonal inverse matrix of A120108.
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3
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1, -2, 1, 0, -3, 1, 0, 0, -2, 1, 0, 0, 0, -5, 1, 0, 0, 0, 0, -1, 1, 0, 0, 0, 0, 0, -7, 1, 0, 0, 0, 0, 0, 0, -2, 1, 0, 0, 0, 0, 0, 0, 0, -3, 1, 0, 0, 0, 0, 0, 0, 0, 0, -1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -11, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Sub-diagonal is -lcm(1,...,n+2)/lcm(1,...,n+1) or -A014963(n+1). Row sums are A120112.
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EXAMPLE
| Triangle begins
1,
-2, 1,
0, -3, 1,
0, 0, -2, 1,
0, 0, 0, -5, 1,
0, 0, 0, 0, -1, 1,
0, 0, 0, 0, 0, -7, 1,
0, 0, 0, 0, 0, 0, -2, 1,
0, 0, 0, 0, 0, 0, 0, -3, 1,
0, 0, 0, 0, 0, 0, 0, 0, -1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, -11, 1
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CROSSREFS
| Sequence in context: A004172 A082754 A063173 * A130055 A202452 A127013
Adjacent sequences: A120108 A120109 A120110 * A120112 A120113 A120114
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KEYWORD
| easy,sign,tabl
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Jun 09 2006
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