56748

Appears in sequences

• Square array of coefficients of binomial polynomials, read by antidiagonals.at n=51A080959
• Number T(n,k) of isoscent sequences of length n with exactly k descents; triangle T(n,k), n>=0, 0<=k<=n+2-ceiling(2*sqrt(n+1)), read by rows.at n=29A242352
• Number of isoscent sequences of length n with exactly two descents.at n=5A243475
• Number of integer partitions of n with all distinct run-sums.at n=45A353837
• Number of ways two dihexes can be placed on an n-th regular hexagonal board.at n=6A372855
• Number of subsets of {1,2,...,n} such that no two elements differ by 1, 2, or 5.at n=30A375980
• a(n) = (1/4) * Sum_{k=0..floor(n/3)} (n-2*k+2) * 2^k * binomial(2*n-4*k+2,2*k+1).at n=11A391837