1,2

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

Table of n, a(n) for n=1..5.

C. Rivera, Prime Puzzle 413: DPS in AP

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

Sequence in context: A209539 A139745 A066992 * A263219 A100521 A111868

Adjacent sequences: A165209 A165210 A165211 * A165213 A165214 A165215

hard,nonn

Fred Schneider, Sep 08 2009

approved