61878

Appears in sequences

• Number of orientable necklaces with 2n beads and two colors which when turned over produce their own color complement.at n=18A059078
• 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, 0, 0), (0, -1, 0), (0, 0, 1), (0, 1, -1), (1, 1, 1)}.at n=8A150865