158700

Appears in sequences

• Define an array by d(m, 0) = 1, d(m, 1) = m; d(m, k) = (m - k + 1) d(m+1, k-1) - (k-1) (m+1) d(m+2, k-2). Sequence gives d(n,4).at n=22A126958
• a(n) = A306302(n)/2.at n=37A331756