53968

Appears in sequences

• Number of freely braided permutations of length n; the freely braided permutations are those that avoid 3421, 4231, 4312 and 4321.at n=10A108600
• Moment sequence of t^2 coefficient in det(tI-A) for random matrix A in USp(4).at n=11A138356
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 1, 0), (0, 1, 1), (1, 0, -1)}.at n=11A148343