5509980288

Appears in sequences

• Denominators of partial sums of Catalan numbers scaled by powers of 1/18^2 = 1/324.at n=4A121001
• Number of compositions of even natural numbers into 8 parts <= n.at n=17A191495
• Number of compositions of odd natural numbers into 8 parts <=n.at n=17A191899
• a(n) = the smallest number m such that gcd(tau(m), sigma(m)) = n where tau(k) = the number of the divisors of k (A000005) and sigma(k) = the sum of the divisors of k (A000203).at n=16A324554