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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. 0
1, 4, 72, 1008, 36400 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

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

LINKS

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

C. Rivera, Prime Puzzle 413: DPS in AP

EXAMPLE

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

CROSSREFS

Sequence in context: A209539 A139745 A066992 * A263219 A100521 A111868

Adjacent sequences:  A165209 A165210 A165211 * A165213 A165214 A165215

KEYWORD

hard,nonn

AUTHOR

Fred Schneider, Sep 08 2009

STATUS

approved

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Last modified September 25 15:54 EDT 2022. Contains 356986 sequences. (Running on oeis4.)