51669

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, 1, 1), (1, 0, 0)}.at n=9A150005
• a(n) = n^5-n^4-n^3-n^2-n.at n=9A152017
• Number of permutations of [n] whose non-fixed points are not neighbors.at n=14A372102
• Odd composites k such that sigma(k) has the same powerful part as k, where sigma is the sum of divisors function.at n=41A386425