A052225 (n+1)!*(n+3)-3.

5, 27, 141, 837, 5757, 45357, 403197, 3991677, 43545597, 518918397, 6706022397, 93405311997, 1394852659197, 22230464255997, 376610217983997, 6758061133823997, 128047474114559997, 2554547108585471997

Offset: 1

Author

Andreas Ulvaer (aulvaer(AT)yahoo.com), Feb 20 2000

Keywords

• nonn
• easy

Examples

			a(2)=27 because 27=(2+1)!*(2+3)-3 or 3*2*1*5-3.
		

Programs

PARI

a(n) = (n+1)!*(n+3) - 3 \\ Michel Marcus, Jun 19 2013

Formula

a(n) = A001048(n+2) - 3. - Michel Marcus, Jun 19 2013

Extensions

More terms from James Sellers, Feb 22 2000