6449664

Appears in sequences

• Expansion of g.f. c(2*x)^4, where c(x) is the g.f. of A000108.at n=8A101596
• 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=12A130813
• Triangle read by rows, T(n,k) for 0<=k<=n, generalizes the Motzkin lattice paths with weights of A003645.at n=46A201639
• Triangle read by rows: T(n,k) = number of colored weighted Motzkin paths ending at (n,k).at n=47A293172