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A105751 IM(Product{k=0..n, 1+kI}), I=sqrt(-1). 1
0, 1, 3, 0, -40, -90, 1050, 6160, -46800, -549900, 3103100, 67610400, -271627200, -11186357000, 26495469000, 2416003824000, -1394099824000, -662595375078000, -936096296850000, 225382826562400000, 819329864480400000, -93217812901913700000, -570263312237604700000 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

CROSSREFS

Cf. A003703, A009454, A105750.

Sequence in context: A157310 A172396 A164806 * A177698 A009786 A012738

Adjacent sequences:  A105748 A105749 A105750 * A105752 A105753 A105754

KEYWORD

easy,sign

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Apr 18 2005

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Last modified February 14 11:36 EST 2012. Contains 205623 sequences.