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Search: id:A141055
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| -1, -2, -60, -120, -5040, -10080, -302400, -604800, -39916800, -79833600, -217945728000, -435891456000, -2615348736000, -5230697472000, -2667655710720000, -5335311421440000, -4257578514309120000, -8515157028618240000, -2810001819444019200000
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OFFSET
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0,2
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COMMENT
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Can be thought of as the second sequence of a family: the first is A091137, the third starts 1, 2, 84, 168.
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FORMULA
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a(n+1)=a(n)*A027760(n+3).
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EXAMPLE
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The first differences of A141045(2,.) are 11-(-19)=30 and -19-11 = -30. The 2nd difference is a(2)= -30-30= -60.
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CROSSREFS
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Sequence in context: A113549 A117482 A078511 this_sequence A048541 A067739 A059934
Adjacent sequences: A141052 A141053 A141054 this_sequence A141056 A141057 A141058
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KEYWORD
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sign
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Aug 01 2008
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EXTENSIONS
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Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 12 2008
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