72285

Appears in sequences

• Numbers k such that k^2 contains only digits {1,2,5}.at n=19A031153
• Numbers k such that k and k^2 use only the digits 1, 2, 5, 7 and 8.at n=13A137008
• 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, 0, -1), (1, 0, 0)}.at n=12A148160
• Composite squarefree numbers n such that p + tau(n) divides n + phi(n), where p are the prime factors of n, tau(n) = A000005(n) and phi(n) = A000010(n).at n=0A229322