|
Search: id:A084007
|
|
| |
|
| 6, 9, 33, 66, 99, 333, 666, 999, 3333, 6666, 9999, 33333, 66666, 99999, 333333, 666666, 999999, 3333333, 6666666, 9999999, 33333333, 66666666, 99999999, 333333333, 444444444, 555555555, 666666666, 777777777, 888888888, 999999999
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
FORMULA
|
Pattern exhibited by early terms does not continue without interruption. First disruption occurs at a(25)=444444444. Terms with k-digits exhibit the earlier pattern where (10^k-1)/9 is square-free, and k=9 is the first occurrence where (10^k-1)/9 is not square-free. Others occur at k=18, 22, 27, 36, 42, 44, 45. - Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 04 2003
|
|
CROSSREFS
|
Cf. A084004, A084005, A084006.
Sequence in context: A091519 A086491 A105866 this_sequence A046634 A025628 A100096
Adjacent sequences: A084004 A084005 A084006 this_sequence A084008 A084009 A084010
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
Amarnath Murthy (amarnath_murthy(AT)yahoo.comandmenakan_s(AT)yahoo.com), May 23 2003
|
|
EXTENSIONS
|
More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), May 31 2003
More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 04 2003
|
|
|
Search completed in 0.002 seconds
|
