1268292

Appears in sequences

• a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 1, 1, 3, 3.at n=16A025256
• Number of permutations of 2 indistinguishable copies of 1..n arranged in a circle with exactly 5 local maxima.at n=5A159719
• Triangle read by rows: T(n,k) is the number of permutations of 2 indistinguishable copies of 1..n arranged in a circle with exactly k local maxima.at n=26A334778