96916

Appears in sequences

• a(n) = Sum_{k=0..floor(n/2)} T(n-k, k), T given by A026692.at n=22A026702
• a(0) = 1, a(n) = (-1)^n + (1/2) * Sum_{j=1..n} (1-(-1)^j-(-2)^j) * binomial(n,j) * a(n-j) for n > 0.at n=7A370092