|
| |
|
|
A039940
|
|
Smallest k for which k, 2k, ... nk all contain the digit 9.
|
|
0
| |
|
|
9, 49, 97, 98, 98, 99, 99, 99, 99, 99, 99, 499, 992, 993, 993, 994, 994, 994, 995, 995, 995, 995, 996, 996, 996, 996, 996, 997, 997, 997, 997, 997, 997, 997, 997, 997, 997, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998, 998
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
EXAMPLE
| a(11)=99 since 99,198,297,396,495,594,693,792,891,990,1089 all contain a 9.
|
|
|
CROSSREFS
| Sequence in context: A110873 A167716 A087352 * A012111 A138998 A016838
Adjacent sequences: A039937 A039938 A039939 * A039941 A039942 A039943
|
|
|
KEYWORD
| base,nonn
|
|
|
AUTHOR
| Erich Friedman (erich.friedman(AT)stetson.edu)
|
|
|
EXTENSIONS
| More terms from Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1999.
|
| |
|
|
