339300

Appears in sequences

• a(n) = (4/(n + 1)) * C(5*n, n).at n=6A124724
• Number of permutations of 1..n containing the relative rank sequence { 145623 } at any spacing.at n=4A159116
• Array t(n,k) = binomial(n*k, n+1)/n, where n >= 1 and k >= 2, read by ascending antidiagonals.at n=39A241262
• Number of partitions lambda of n that satisfy gcd(lambda_i, n-1) = 1 for all i.at n=53A323256