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A049689 a(n)=Sum{((-1)^(i+1))*T(i,n-i): i=0,1,...,n}, array T as in A049687. +0
2
0, 0, 1, 0, 3, 0, 5, 0, 9, 0, 13, 0, 17, 0, 23, 0, 31, 0, 37, 0, 45, 0, 55, 0, 63, 0, 75, 0, 87, 0, 95, 0, 111, 0, 127, 0, 139, 0, 157, 0, 173, 0 (list; graph; listen)
OFFSET

0,5

CROSSREFS

Sequence in context: A049283 A160035 A051704 this_sequence A118657 A047760 A050925

Adjacent sequences: A049686 A049687 A049688 this_sequence A049690 A049691 A049692

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.


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