37770

Appears in sequences

• a(1) = 1; a(n) = phi(n) - phi(n-1)* a(n-1) if n > 1.at n=10A079895
• Squarefree numbers sandwiched between two brilliant numbers.at n=5A085706
• 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, 1, 0), (0, 1, 1), (1, 0, 0)}.at n=8A151042