10388224

Appears in sequences

• If X_1,...,X_n is a partition of a 2n-set X into 2-blocks then a(n) is equal to the number of 5-subsets of X containing none of X_i, (i=1,...n).at n=30A130811
• Number of arrangements of n indistinguishable balls in n boxes with the maximum number of balls in any box equal to n-5.at n=26A180295