4054050

Appears in sequences

• Triangular table of 2^n *(n+k)! / ((n-k)! * k! * 4^k).at n=43A043302
• a(n) = (2*n)!/(n!*2^(n-1)).at n=8A097801
• Triangle read by rows: T(n,k) is the sum of the weights of all vertices labeled k at depth n in the Catalan tree (1 <= k <= n+1, n >= 0).at n=37A102625
• Triangle read by rows: see A128196 for definition.at n=37A126063
• Product of the numbers k in the range 1 <= k <= n such that the proper divisors of k are a subset of the proper divisors of n.at n=14A158977
• Number of (n+2) X 7 binary arrays avoiding patterns 001 and 110 in rows, columns and nw-to-se diagonals.at n=30A202444
• Triangle read by rows: number of idempotents of rank k in Brauer monoid B_n.at n=59A256036
• a(1) = 1; thereafter a(n) is the product of all 0 < m < n for which a(m) divides n.at n=15A271503
• A008336(n) is divisible by the product of the primes p such that n/2 <= p < n; a(n) is the quotient.at n=39A370971