Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A071809
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A071809 Smallest s such that sk-1 is square-free for 1 <= k <= n. +0
1
2, 2, 2, 2, 4, 4, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 12, 12, 24, 120, 120, 120, 120, 120, 150, 150, 150, 150, 240, 240, 240, 240, 240, 240, 300, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840 (list; graph; listen)
OFFSET

1,1

PROGRAM

(PARI) for(n=1, 57, s=1; while(sum(i=1, n, issquarefree(s*i-1))<n, s++); print1(s, ", "))

CROSSREFS

Sequence in context: A035398 A104409 A032576 this_sequence A104976 A010334 A010578

Adjacent sequences: A071806 A071807 A071808 this_sequence A071810 A071811 A071812

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 06 2002

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 10 12:37 EST 2009. Contains 170569 sequences.


AT&T Labs Research