31380096

Appears in sequences

• a(n) = (n+1)*binomial(n+1, 9).at n=15A027769
• a(n) = (n+1)*binomial(n+1, 15).at n=9A027775
• 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 7-subsets of X containing none of X_i, (i=1,...n).at n=16A130813