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Search: id:A109892
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| A109892 |
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a(n) = least integer of the form (n!+1)(n!+2)...(n!+k)/n!. |
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+0
2
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| 2, 6, 84, 20475, 234531275, 199200973555045, 16481425431663122588749, 173392935733620216899469862542865, 300717095810709134168380432250652303057474577
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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k <= n. Subsidiary sequence: n such that k < n.
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EXAMPLE
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a(4)=25*26*27*28/24=20475.
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MAPLE
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A109892 := proc(n) local k, fn; k := 1; fn := n! ; while mul(fn+i, i=1..k) mod fn <> 0 do k := k+1; od ; RETURN(mul(fn+i, i=1..k)/fn) ; end: seq(A109892(n), n=1..10) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 15 2007
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CROSSREFS
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Sequence in context: A114552 A055706 A118537 this_sequence A055702 A128265 A087277
Adjacent sequences: A109889 A109890 A109891 this_sequence A109893 A109894 A109895
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 13 2005
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EXTENSIONS
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Corrected and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 15 2007
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