15966720

Appears in sequences

• Sum of non-unitary divisors of central binomial coefficient C(n, floor(n/2)).at n=25A064141
• a(n) = (4*n)!*(n+1)!/(2*n)!.at n=3A065236
• Let f(0) = 0, f(1) = 1 and for n > 1 let f(n) = (-1)*sum((-1)^(n+r)*f(r),r=0..n-2)/(n*(n-1)); sequence gives denominator of f(n).at n=12A090765
• If S is countable finite set, we can define n as number of elements in S. There are n^n distinct functions f(S)->S. Each function has a fixed point, or an orbit in S. This sequence is a number of distinct functions g(S)->S, with largest orbit.at n=11A162682
• The least number which can be represented as a product of the greatest number of distinct positive integers in exactly n ways.at n=26A338159