1386000

Appears in sequences

• Triangle where T(n,k) = -n!*[x^k] ( x/log(1-x-x^2) )^(n+1), for n>=k>=0, read by rows.at n=31A118791
• Numerator of the harmonic mean of the first n composite numbers.at n=14A250132
• a(n) = Product_{d|n, d<n} prime(A304101(d)-1).at n=83A304102
• Number of unordered quadruples of self-avoiding paths with nodes that cover all vertices of a convex n-gon.at n=10A360275
• a(n) is the smallest number k with exactly n of its divisors in A037197.at n=26A362139
• Triangle read by rows: T(n,k) is the number of sets of noncrossing paths of size k that cover n nodes arranged in a circle with one node paths disallowed, 0 <= k <= floor(n/2).at n=40A390893