Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A129254
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A129254 Numbers n such that both n and n+1 have at least one divisor of the form p^e with p<=e, p prime. +0
2
27, 80, 135, 188, 243, 296, 351, 404, 459, 512, 567, 620, 675, 728, 783, 836, 891, 944, 999, 1052, 1107, 1160, 1215, 1268, 1323, 1376, 1431, 1484, 1539, 1592, 1647, 1700, 1755, 1808, 1863, 1916, 1971, 2024, 2079, 2132, 2187, 2240, 2295, 2348, 2403, 2456 (list; graph; listen)
OFFSET

1,1

COMMENT

A129251(a(n)) > 0, A129251(a(n)+1) > 0;

if A100716(k) = a(n) then: A100716(k+1) = a(n) + 1; subsequence of A100716.

EXAMPLE

135=5*3^3 and 135+1=136=17*2^3, therefore 135 is a term: a(3)=135;

188=47*2^2 and 188+1=189=7*3^3, therefore 188 is a term: a(4)=188.

CROSSREFS

Sequence in context: A121737 A124726 A126381 this_sequence A034033 A057609 A008884

Adjacent sequences: A129251 A129252 A129253 this_sequence A129255 A129256 A129257

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 07 2007

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 November 25 20:09 EST 2009. Contains 167514 sequences.


AT&T Labs Research