OFFSET
0,2
FORMULA
a(n)=sum{k=0..n, Bin(n+k, floor((n-k)/2))}.
Conjecture: +n*(n+6)*(n-5)*a(n) -(n+6)*(n^2-3*n-6)*a(n-1) -2*(n+6)*(3*n^2-20*n
+27)*a(n-2) +(n+6)*(3*n^2-19*n+36)*a(n-3) +2*(4*n-15)*(n-3)*(n+6)*a(n-4) +4*(n-3
)*(n-4)*(n+6)*a(n-5)=0. - R. J. Mathar, Dec 10 2014
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Nov 16 2003
STATUS
approved