40660

Appears in sequences

• Numbers k such that sigma(k) = sigma(k+4).at n=31A015863
• 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, 0), (-1, 0, 1), (1, 0, 0), (1, 1, -1)}.at n=10A148615
• Larger of amicable pair m < n defined by t(n) = m and t(m) = n where t(n) = psi(n) - n and psi(n) = A001615(n) is the Dedekind psi function.at n=19A323330
• Number of ways to write n as an ordered sum of ten positive Fibonacci numbers (with a single type of 1).at n=11A357730