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A123367 (n!-2^n)/8. 0
1, 11, 82, 614, 5008, 45296, 453472, 4989344, 59874688, 778376576, 10897284352, 163459291904, 2615348727808, 44460928495616, 800296713183232, 15205637551038464, 304112751021948928, 6386367771463417856, 140500090972200435712, 3231502092360621031424 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

LINKS

Table of n, a(n) for n=4..23.

MATHEMATICA

Table[(n!-2^n)/8, {n, 4, 30}] (* Harvey P. Dale, Aug 19 2012 *)

CROSSREFS

Cf. A123642.

Sequence in context: A211845 A029887 A026871 * A177142 A129388 A030692

Adjacent sequences:  A123364 A123365 A123366 * A123368 A123369 A123370

KEYWORD

nonn

AUTHOR

aminu alhaji ibrahim (aminualhaji(AT)yahoo.co.uk), Oct 12 2006

EXTENSIONS

Corrected and extended by Harvey P. Dale, Aug 19 2012

STATUS

approved

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Last modified June 18 03:02 EDT 2013. Contains 226328 sequences.