142149

Appears in sequences

• Sum(j=1,n,floor(A000041(j)/j)).at n=60A086736
• Sum of largest parts of all compositions of n.at n=15A102712
• 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), (-1, 0, 1), (0, -1, 1), (1, 1, -1), (1, 1, 1)}.at n=9A149748
• Numbers n such that sigma(Rev(phi(n))) = phi(Rev(sigma(n))), where sigma is the sum of divisors and phi the Euler totient function.at n=22A252255