OFFSET
0,2
COMMENTS
Hankel transform is A178115.
The formula below seems to generate A026392, not these terms. - R. J. Mathar, Feb 10 2015
FORMULA
a(n)=sum{k=0..n, C(floor(n/2),floor(k/2))*((1+(-1)^(n-k))/2)*C(k+1,floor((k+1)/2).
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, May 20 2010
STATUS
approved