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Search: id:A054516
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| A054516 |
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Equivalent of the Kurepa hypothesis for left factorial. |
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+0
1
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| 0, 2, 2, 6, -4, 50, -258, 1862, -14824, 133506, -1334950, 14684582, -176214828, 2290792946, -32071101034, 481066515750, -7697064251728, 130850092279682, -2355301661033934, 44750731559645126, -895014631192902100
(list; graph; listen)
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OFFSET
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3,2
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REFERENCES
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A. Petojevic, M.Zizovic, Trees and the Kurepa hypothesis for left factorial, Filomat (Nis), (1999), 31-40.
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FORMULA
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a(3)=0, a(n)= -(n-3)*a(n-1) + (n-3)*(n-2)
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CROSSREFS
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Sequence in context: A061807 A062885 A062293 this_sequence A062400 A064766 A121178
Adjacent sequences: A054513 A054514 A054515 this_sequence A054517 A054518 A054519
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KEYWORD
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sign,easy
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AUTHOR
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Aleksandar Petojevic (apetoje(AT)ptt.yu), Apr 09 2000
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EXTENSIONS
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More terms from James A. Sellers (sellersj(AT)math.psu.edu), Apr 09 2000
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