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Search: id:A119837
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A119837 a(n)=(2n)!/n!-(2n)!/(n-1)!. +0
2
1, 0, -12, -240, -5040, -120960, -3326400, -103783680, -3632428800, -141145804800, -6033983155200, -281585880576000, -14248245557145600, -777177030389760000, -45464856277800960000, -2839804869044183040000, -188644180586506444800000 (list; graph; listen)
OFFSET

0,3

COMMENT

Row sums of number triangle A119836.

FORMULA

a(n)=A001813(n)-2*A001814(n).

CROSSREFS

Sequence in context: A012544 A009052 A012303 this_sequence A012538 A006588 A009150

Adjacent sequences: A119834 A119835 A119836 this_sequence A119838 A119839 A119840

KEYWORD

easy,sign

AUTHOR

Paul Barry (pbarry(AT)wit.ie), May 25 2006

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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