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Search: id:A109893
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| A109893 |
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a(n) = least integer of the form (n!-1)(n!-2)...(n!-k)/n!. |
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+0
1
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| 10, 8855, 182637273, 187913191983517, 16299312030218924938187, 173083581780047419995380839040497, 300642522445723721070400405660702004585922575, 109109034687569422667248530075550555291614316919209445960161, 10269669381215922304236773275682334781908421087118493054965910074350106387039
(list; graph; listen)
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OFFSET
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3,1
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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(3) = 5*4*3/6 =10. a(4) = 23*22*21*20/4! = 8855.
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MAPLE
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A109893 := proc(n) local k ; for k from 1 to n do if mul( n!-i, i=1..k) mod ( n! ) = 0 then RETURN( mul(n!-i, i=1..k)/n!) ; fi ; od: end: seq(A109893(n), n=3..12) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 13 2008
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CROSSREFS
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Cf. A109892.
Sequence in context: A121787 A108089 A125543 this_sequence A125544 A137641 A137642
Adjacent sequences: A109890 A109891 A109892 this_sequence A109894 A109895 A109896
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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), Feb 13 2008
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