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A105596 a(n)=sum{k=0..n, A105595(k)*(-1)^k*A105595(n-k)} (interpolated zeros suppressed). 2
1, 5, 13, 17, 25, 25, 33, 21, 9, -15, -23, -3, -11, -31, -47, -35, 5, -47, -83, -75, -211, -295, -267, -267, -99, -107, -159, -415, -347, -679, -279 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

A convolution related to A105595.

Conjecture : a(2n)=1 mod 4 for all n, a(2n+1)=0 for all n.

CROSSREFS

Sequence in context: A074278 A087895 A092101 * A037046 A126887 A087445

Adjacent sequences:  A105593 A105594 A105595 * A105597 A105598 A105599

KEYWORD

easy,sign

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Apr 14 2005

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Last modified February 14 17:00 EST 2012. Contains 205637 sequences.