243374040

Appears in sequences

• Number of tree-rooted bridgeless planar maps with two vertices and n faces.at n=15A002740
• As n increases, the reciprocal of a(n) = asymptotic fraction of positive integers whose longest string of consecutive divisors is A181062(n).at n=12A181121
• a(n) = (1/2)*(n + 1)*(5*n^2 + 15*n + 6)*Pochhammer(n, 6) / 6!.at n=14A293612
• a(n) is the least common multiple of the nonzero digits in factorial base expansion of 1/n.at n=30A343505
• a(n) = lcm({1, 2, ..., n}) * (n + 1) / n for n > 0, a(0) = 1.at n=22A387027