140272

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), (-1, 1, 1), (0, 1, -1), (1, 0, 1)}.at n=10A149342
• Number of (w,x,y,z) with all terms in {1,...,n} and w^2<=x^2+y^2+z^2.at n=20A212093
• Number of permutations of [n] whose compositional square is the identity permutation or its reverse.at n=12A383835