191802

Appears in sequences

• a(n) = (n+1)*a(n-1) + (2-n)*a(n-2).at n=8A006183
• T(n,2), array T as in A054090.at n=8A054096
• Number of 0..7 arrays x(0..n) of n+1 elements with zero n-1st differences.at n=12A200081