66820

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, 0), (0, 0, -1), (1, 0, 1)}.at n=11A148668
• a(n) = n^4 + 5*n^2 + 4.at n=16A156798
• Practical numbers q with q + 2 and q^2 + 2 both practical.at n=30A294225
• Total number of nodes summed over all lattice paths from (0,0) to (i,n-2*i) that do not go above the diagonal x=y using steps in {(1,0), (0,1)}.at n=24A357655