11785890

Appears in sequences

• Super ballot numbers: 6(2n)!/(n!(n+2)!).at n=16A007054
• a(n) = 6*(2n-4)!/((n-2)!n!), if n>2. a(0) = 1, a(1) = a(2) = 2.at n=18A091712
• a(n) = lcm(1, 2, ..., 2n) / lcm(1, 2, ..., n).at n=17A093880
• a(n) = lcm(1, 2, ..., 2n) / lcm(1, 2, ..., n).at n=18A093880
• The radical of the Catalan number which is the largest squarefree number dividing binomial(2*n,n)/(n+1).at n=16A281594
• a(n) = product of primes p such that p^k <= n < 2*p^k for some k >= 1.at n=34A366369
• a(n) = product of primes p such that p^k <= n < 2*p^k for some k >= 1.at n=35A366369
• a(n) = product of primes p such that p^k <= n < 2*p^k for some k >= 1.at n=36A366369
• a(n) = 3/(n + 1) * Catalan(2*n).at n=8A387248