A075183 One half of third column of triangle A075181.

1, 11, 105, 1020, 10500, 115920, 1375920, 17539200, 239500800, 3492720000, 54226972800, 893577484800, 15583119552000, 286816578048000, 5557616064000000, 113108602134528000, 2412627824775168000

Offset: 0

Author

Wolfdieter Lang, Sep 19 2002

Keywords

• nonn
• easy

Comments

Also one half of third diagonal of triangle A048594.

Crossrefs

Cf. A008275, A048594, A075181.

Formula

a(n) = A075181(n+3, 2)/2 = A048594(n+3, n+1)/2, n>=0.

a(n) = (n+1)!*S1(n+3, n+1)/2 with S1(n, m) := A008275(n, m) (Stirling1).