66780155

Appears in sequences

• a(n) = T(n,[ n/2 ]), where T is the array in A026300.at n=23A026307
• Number of self-avoiding planar walks starting at (0,0), ending at (n,n), remaining in the first quadrant and using steps (0,1), (-1,1), and (1,-1) with the restriction that (-1,1) and (1,-1) are always immediately followed by (0,1).at n=12A327871