26453700

Appears in sequences

• a(n) = 9*(n+1)*binomial(n+2,9)/2.at n=12A027782
• a(n) = 13*(n+1)*binomial(n+2,13)/2.at n=8A027786
• Ordered set partitions of the set {1, 2, ..., 4*n} with all block sizes divisible by 4, irregular triangle T(n, k) for n >= 0 and 0 <= k < A000041(n), read by rows.at n=15A327024