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A127251
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Inverse of number triangle A127249.
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2
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1, -2, 1, 2, -2, 1, 0, 0, 0, 1, 0, 0, 0, -2, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, -2, 1, 0, 0, 0, 0, 0, 0, 2, -2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Product of A127248 and A127244. Row sums are A127252.
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EXAMPLE
| Triangle begins
1,
-2, 1,
2, -2, 1,
0, 0, 0, 1,
0, 0, 0, -2, 1,
0, 0, 0, 0, 0, 1,
0, 0, 0, 0, 0, 0, 1,
0, 0, 0, 0, 0, 0, -2, 1,
0, 0, 0, 0, 0, 0, 2, -2, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
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CROSSREFS
| Sequence in context: A108804 A200227 A127249 * A063251 A060208 A004570
Adjacent sequences: A127248 A127249 A127250 * A127252 A127253 A127254
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KEYWORD
| sign,tabl
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Jan 10 2007
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