1051723530

Appears in sequences

• a(n) = (3*n)! / ((n+1)*(n!)^3).at n=8A007004
• Late-growing permutations: number of permutations of 8 indistinguishable copies of 1..n with every partial sum <= the same partial sum averaged over all permutations.at n=2A147695
• Number of permutations of 0..floor((n*3-1)/2) on even squares of an n X 3 array such that each row and column of even squares is increasing.at n=15A215287
• Number of permutations of 0..floor((n*3-2)/2) on odd squares of an n X 3 array such that each row and column of odd squares is increasing.at n=15A215294