384720

Appears in sequences

• Arrays of dumbbells.at n=19A002940
• 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, 0), (-1, 0, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 0)}.at n=12A148592
• Triangular array read by rows. T(n,k) is the number of 2-colored labeled graphs on n nodes with exactly k connected components; n>=1, 1<=k<=n.at n=31A228892
• Triangle read by rows: T(n,k) is the number of labeled weakly graded (ranked) posets with n elements and rank k.at n=33A361951