A165212 The n-th term in the sequence is the minimal number that has some subset of DPS's that form an n-term arithmetic progression.

1, 4, 72, 1008, 36400

Offset: 1

Author

Fred Schneider, Sep 08 2009

Keywords

• hard
• nonn

Comments

Definition: m is a DPS (divisor pair sum) for n, if m = d + n/d where d | n, and d <= n/d.

Examples

			72's solution: 3+24, 4+18, 8+9. The difference between terms is 5. (Note: 72 = 3*24 = 4*18 = 8*9)
		

Links

• C. Rivera, Prime Puzzle 413: DPS in AP