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Search: id:A051631
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| A051631 |
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Rows of triangle formed using Pascal's rule except begin and end n-th row with n-1. |
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+0
1
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| -1, 0, 0, 1, 0, 1, 2, 1, 1, 2, 3, 3, 2, 3, 3, 4, 6, 5, 5, 6, 4, 5, 10, 11, 10, 11, 10, 5, 6, 15, 21, 21, 21, 21, 15, 6, 7, 21, 36, 42, 42, 42, 36, 21, 7, 8, 28, 57, 78, 84, 84, 79, 57, 28, 8, 9, 36, 85, 135, 162, 168, 162, 135, 85, 36, 9
(list; graph; listen)
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OFFSET
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0,7
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EXAMPLE
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-1; 0,0; 1,0,1; 2,1,1,2; 3,3,2,3,3; ...
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CROSSREFS
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Row sums give A000918(n).
Sequence in context: A060240 A128495 A054989 this_sequence A073725 A055223 A054482
Adjacent sequences: A051628 A051629 A051630 this_sequence A051632 A051633 A051634
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KEYWORD
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easy,nice,sign
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AUTHOR
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Asher Auel (asher.auel(AT)reed.edu)
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