56856

Appears in sequences

• Octagonal numbers which are the sums of exactly two positive octagonal numbers.at n=26A136346
• 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, -1, 0), (-1, -1, 1), (-1, 1, -1), (1, 0, 1)}.at n=12A148060
• a(n) is the number of terms less than A276086(n) in the range of A276086, where A276086 is the primorial base exp-function.at n=59A376411
• Integers k such that there exists an integer 0<m<k such that (1/sigma(m)^2 + 1/sigma(k)^2)*(m+k)^2 = 1.at n=15A383964