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A091756
Seventh column (m=8) of array A091752 ((-1,2)Stirling2).
1
1, 220, 48720, 14463680, 5762556800, 3000655257600, 1987324218880000, 1634736979972096000, 1636859558116823040000, 1961447726093804748800000, 2772502956616965206835200000, 4565871212782705024303104000000
OFFSET
4,2
FORMULA
a(n)= A091752(n, 8), n>=4.
a(n)= (9/6!)*(n-3)*(9*n^3-45*n^2+36*n+40)*(3*(n-3))!/((3^(n-3))*(n-3)!)= (9/6!)*(n-3)*(9*n^3-45*n^2+36*n+40)*A052502(n-3), n>=4.
CROSSREFS
Sequence in context: A140918 A049023 A282591 * A167825 A339680 A266237
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Feb 27 2004
STATUS
approved