22690

Appears in sequences

• Expansion of (1-x)/(1-3*x-2*x^2-3*x^3).at n=8A077838
• 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, 1, 1), (0, 0, -1), (1, 0, 0)}.at n=11A148160
• Number of non-Hamiltonian labeled simple graphs with n vertices.at n=6A326207
• Triangle read by rows: T(n,k) is the number of oriented graphs on n unlabeled nodes with k arcs, n >= 0, k = 0..n*(n-1)/2.at n=61A350733
• Triangle read by rows: T(n,k) is the number of weakly connected oriented graphs on n unlabeled nodes with k arcs, n >= 1, k = 0..n*(n-1)/2.at n=60A350734