2092112

Appears in sequences

• Triangle read by rows: T(n,k) = (1/k) times the number of functions from an n-element set into but not onto a k-element set.at n=35A101031
• a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks the digits 1 and 2 and at least one of digits 3,4,5,6,7,8,9.at n=6A125908
• a(n) = (n+1)^n - n!.at n=6A126130
• 2^(n*(n-1)/2) - n!.at n=7A127429