40659

Appears in sequences

• Number of length n+5 0..2 arrays with at most two downsteps in every 5 consecutive neighbor pairs.at n=4A255619
• T(n,k)=Number of length n+k 0..2 arrays with at most two downsteps in every k consecutive neighbor pairs.at n=40A255622
• Number of length n+5 0..2 arrays with at most two downsteps in every n consecutive neighbor pairs.at n=4A255627
• G.f.: Sum_{k>=0} A000041(k) * x^k / Sum_{k>=0} A000009(k)^2 * x^k.at n=24A304987