OFFSET
0,4
COMMENTS
Diagonal sums of A110510.
FORMULA
a(0)=1, a(n)=sum{k=0..floor(n/2), (k/(n-k))*C(2n-3k-1, n-2k)*2^(n-2k)}, n>0.
Conjecture: 2*(n-1)*a(n) +(41-17*n)*a(n-1) +4*(2n-5)*a(n-2) +(n-1)*a(n-3) +4*(5-2n)*a(n-4)=0. - R. J. Mathar, Dec 10 2011
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Jul 24 2005
STATUS
approved