175400

Appears in sequences

• Number of length n+4 0..3 arrays with at most one downstep in every n consecutive neighbor pairs.at n=9A258734
• a(n) = a(n-1) - a(n-2) + a(n-3) + a(n-4), with a(1) = a(2) = a(3) = a(4) = 1.at n=49A343885