Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A165212
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
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
1, 4, 72, 1008, 36400 (list; graph; listen)
OFFSET

1,2

COMMENT

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

LINKS

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: A119580 A139745 A066992 this_sequence A100521 A111868 A060645

Adjacent sequences: A165209 A165210 A165211 this_sequence A165213 A165214 A165215

KEYWORD

hard,nonn

AUTHOR

Fred Schneider (frederick.william.schneider(AT)gmail.com), Sep 08 2009

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified December 17 13:29 EST 2009. Contains 170826 sequences.


AT&T Labs Research