1744200

Appears in sequences

• a_n = - sum_{i=1..n-1} C(i+1, n-i) (-1)^(n-i) a_i.at n=9A028380
• a(n) = (n+1)*binomial(n+7, 7).at n=14A056001
• Triangle T(n, k) = (2*n+1)!! * 2^(floor((n-1)/2) + floor(k/2) + 1) * Beta(floor(n/2) + floor((k-1)/2) + 2, floor((n-1)/2) + floor(k/2) + 2), read by rows.at n=39A158868