183456

Appears in sequences

• Convolution of Bell and Catalan numbers.at n=10A014327
• Product of all n - d, where 1 < d < n and d is a divisor of n.at n=27A072512
• Difference between counts of odd composites in A093151 and A093152 [Count (1 mod 4) - count (3 mod 4)].at n=13A093153
• Number of 3-cycles in the n X n rook graph.at n=27A288961
• Coefficient triangle of polynomials recursively defined by P(n,x) = (n+1)*(n+1)! + x*Sum_{k=1..n} k^2*n!/(n+1-k)!*P(n-k,x) with P(0,x) = 1.at n=39A322970
• a(n) is the smallest number m with exactly n divisors whose last digit equals the last digit of m.at n=22A335491
• a(n) is the least number with exactly n divisors of the form 5*k+2.at n=27A364598
• a(n) is the least number with exactly n divisors of the form 5*k+3.at n=27A364599
• Triangle read by rows where T(n,k) is the number of labeled loop-graphs with n vertices and n edges, k of which are loops.at n=41A368928
• Triangle read by rows: T(n,k) = binomial(n+1,k+1)*binomial(2*n-k+1,k)/(n+1), 0<=k<=n.at n=60A391045