267120

Appears in sequences

• a(n)=1*(n+2)!-2*(n+1)!-3*n!.at n=7A152456
• Number of ordered pairs of permutation functions on n elements satisfying f(f(f(x))) = g(f(g(x))).at n=7A239839
• Numbers k such that k = x + y, k' = x' + y' and k'' = x'' + y'', where k' and k'' are the first and second arithmetic derivatives of k.at n=29A293252
• Sum over all partitions of n of the LCM of the number of parts and the number of distinct parts.at n=32A339394
• a(n) = lcm({i, i = 1..n}) / Product_{2 <= p < n, p prime} p.at n=53A362988