OFFSET
2,2
FORMULA
Sixth diagonal of array defined by T(i, 1)=T(1, j)=1, T(i, j)=Max(T(i-1, j)+T(i-1, j-1); T(i-1, j-1)+T(i, j-1)) - Benoit Cloitre, Aug 05 2003
G.f.: x^2/[(1-3x+x^2)(1-x)^4].
a(n) = Sum_{k=0..n}(binomial(n+3,k+4)*Fibonacci(k)). - Vladimir Kruchinin, Oct 24 2016
PROG
(Maxima)
a(n):=sum(binomial(n+3, k+4)*fib(k), k, 0, n); /* Vladimir Kruchinin, Oct 24 2016 */
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, May 02 2000
STATUS
approved