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A034831 One quarter of sept-factorial numbers. +0
3
1, 11, 198, 4950, 158400, 6177600, 284169600, 15060988800, 903659328000, 60545174976000, 4480342948224000, 362907778806144000, 31935884534940672000, 3033909030819363840000, 309458721143575111680000 (list; graph; listen)
OFFSET

1,2

LINKS

Index entries for sequences related to factorial numbers

FORMULA

4*a(n) = (7*n-3)(!^7) := product(7*j-3, j=1..n); E.g.f. (-1+(1-7*x)^(-4/7))/4.

CROSSREFS

Cf. A045754, A034829-A034834.

Sequence in context: A072290 A112127 A105124 this_sequence A142362 A112733 A088295

Adjacent sequences: A034828 A034829 A034830 this_sequence A034832 A034833 A034834

KEYWORD

easy,nonn

AUTHOR

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)

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Last modified August 29 17:10 EDT 2008. Contains 143238 sequences.


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