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A004786
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6!(2n-7)!/n!(n-1)! is an integer.
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0
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4, 6, 7, 991, 2481, 3479, 6163, 6581, 8178, 8179, 9272, 10288, 12195, 13067, 13976, 15199, 15813, 16172, 18371, 18686, 18723, 18747, 19294, 19438, 19506, 23531, 26198, 26315, 26678, 27877, 28429, 30553, 30593, 30689, 31327, 31375, 32882, 33006, 33451
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MATHEMATICA
| Select[Range[10^4], IntegerQ[6! (2 # - 7)!/(#! (# - 1)!)] &] (* Arkadiusz Wesolowski, Sep 06 2011 *)
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CROSSREFS
| Sequence in context: A192121 A012760 A107648 * A195387 A181097 A206798
Adjacent sequences: A004783 A004784 A004785 * A004787 A004788 A004789
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KEYWORD
| nonn
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AUTHOR
| R. K. Guy (rkg(AT)cpsc.ucalgary.ca)
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EXTENSIONS
| More terms from David W. Wilson, Dec 11 1999
Offset corrected and 2 initial terms added by Arkadiusz Wesolowski, Sep 06 2011
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