153552

Appears in sequences

• Numbers n such that 107*2^n-1 is prime.at n=26A050579
• Numbers n such that phi(sigma(n)) = 5*phi(n).at n=22A067708
• Number of (n+2) X 9 binary arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.at n=21A190031
• Number of obtuse isosceles triangles on a centered hexagonal grid of size n.at n=12A241230
• Lexicographically first sequence of positive integers such that all disjoint equivalent sets of K terms have distinct sums for 1 <= K <= 4.at n=23A349777