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A140216
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Numerators of the inverse triangle defined in A133135.
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1
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1, -1, 1, 1, -3, 1, -1, 3, -2, 1, 1, -5, 2, -5, 1, -1, 5, -1, 5, -3, 1, 1, -7, 1, 0, 3, -7, 1, -1, 7, -4, 0, 2, 7, -4, 1, 1, 3, 4, -21, -2, 21, 4, -9, 1, -1, -3, 13, 21, -26, -21, 10, 9, -5, 1, 1, -121, -13, 66, 26, -231, -10, 33, 5, -11, 1, -1, 121, -142, -66, 229, 231, -116, -33, 25, 11, -6
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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COMMENTS
| Row sums 1, 0, -1, 1, -6, 6, -8, 8, 2, -2,.. build in pairs.
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EXAMPLE
| The triangle starts
1;
-1, 1;
1,-3, 1;
-1, 3,-2, 1;
1,-5, 2, -5, 1;
-1, 5,-1, 5, -3, 1;
1,-7, 1, 0, 3, -7, 1;
-1, 7,-4, 0, 2, 7,-4, 1;
1, 3, 4,-21, -2, 21, 4,-9, 1;
-1,-3,13, 21,-26,-21,10, 9,-5,1;
Pairs of numbers appear along adjacent diagonals. The first subdiagonal contains the sequence -A026741(n+2).
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CROSSREFS
| Cf. A133135, A140218.
Sequence in context: A054398 A093415 A106749 * A176514 A077196 A023142
Adjacent sequences: A140213 A140214 A140215 * A140217 A140218 A140219
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KEYWORD
| sign,frac,tabl
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Jun 22 2008
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EXTENSIONS
| Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 06 2008
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