38738

Appears in sequences

• a(0)=1; a(n) = Sum_{j<n, gcd(n,a(j)) = 1} a(j).at n=39A055935
• 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, 1), (0, 0, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.at n=8A150270
• Number of length-n 0..5 arrays with no repeated value differing from the previous repeated value by other than plus two or minus 1.at n=5A269637
• T(n,k)=Number of length-n 0..k arrays with no repeated value differing from the previous repeated value by other than plus two or minus 1.at n=50A269640
• Number of length-6 0..n arrays with no repeated value differing from the previous repeated value by other than plus two or minus 1.at n=4A269643