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A159964 a(n)=2^n*(1-n). 2
1, 0, -4, -16, -48, -128, -320, -768, -1792, -4096, -9216, -20480, -45056, -98304, -212992, -458752, -983040, -2097152, -4456448, -9437184, -19922944, -41943040, -88080384, -184549376, -385875968, -805306368, -1677721600, -3489660928 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

COMMENTS

Hankel transform of A124791. Binomial transform of -A060747.

LINKS

Index to sequences with linear recurrences with constant coefficients, signature (4,-4

FORMULA

G.f.: (1-4x)/(1-2x)^2.

a(n) = -A058922(n). - Jeffrey R. Goodwin, Nov 11 2011

CROSSREFS

Sequence in context: A203248 A071009 A131126 * A058922 A034918 A119003

Adjacent sequences:  A159961 A159962 A159963 * A159965 A159966 A159967

KEYWORD

easy,sign

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Apr 28 2009

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Last modified February 14 10:09 EST 2012. Contains 205614 sequences.