73253

Appears in sequences

• 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), (0, 0, 1), (1, 0, 1)}.at n=9A150301
• Number of unlabeled multigraphs with loops allowed and n edges covering three vertices.at n=31A327728
• Expansion of 1/( (1 + x) * (1 - x^2*(1 + x)^3) ).at n=20A375364