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Search: id:A117438
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| A117438 |
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Number triangle T(n,k)=[k<=n]*C(2n-k,k)*(-4)^(n-k). |
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+0
3
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| 1, -4, 1, 16, -12, 1, -64, 80, -24, 1, 256, -448, 240, -40, 1, -1024, 2304, -1792, 560, -60, 1, 4096, -11264, 11520, -5376, 1120, -84, 1, -16384, 53248, -67584, 42240, -13440, 2016, -112, 1, 65536, -245760, 372736, -292864, 126720, -29568, 3360, -144, 1, -262144, 1114112, -1966080, 1863680
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Row sums are 1,-3,5,-7,.... Diagonal sums are a signed version of A117439. Rows correspond to diagonals of A117435.
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EXAMPLE
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Triangle begins
1,
-4, 1,
16, -12, 1,
-64, 80, -24, 1,
256, -448, 240, -40, 1,
-1024, 2304, -1792, 560, -60, 1,
4096, -11264, 11520, -5376, 1120, -84, 1
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CROSSREFS
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Sequence in context: A138681 A038231 A104855 this_sequence A075499 A099394 A059991
Adjacent sequences: A117435 A117436 A117437 this_sequence A117439 A117440 A117441
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KEYWORD
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easy,sign,tabl
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Mar 16 2006
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