The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 999 |
| 2 | 1999 |
| 3 | 2999 |
| 4 | 3999 |
| 5 | 4999 |
| 6 | 5999 |
| 7 | 6999 |
| 8 | 7999 |
| 9 | 8999 |
| 10 | 9099 |
| 11 | 9199 |
| 12 | 9299 |
| 13 | 9399 |
| 14 | 9499 |
| 15 | 9599 |
| 16 | 9699 |
| 17 | 9799 |
| 18 | 9899 |
| 19 | 9909 |
| 20 | 9919 |
| 21 | 9929 |
| 22 | 9939 |
| 23 | 9949 |
| 24 | 9959 |
| 25 | 9969 |
| 26 | 9979 |
| 27 | 9989 |
| 28 | 9990 |
| 29 | 9991 |
| 30 | 9992 |
| 31 | 9993 |
| 32 | 9994 |
| 33 | 9995 |
| 34 | 9996 |
| 35 | 9997 |
| 36 | 9998 |
| 37 | 10999 |
[999,1999,2999,3999,4999,5999,6999,7999,8999,9099, 9199,9299,9399,9499,9599,9699,9799,9899,9909,9919, 9929,9939,9949,9959,9969,9979,9989,9990,9991,9992, 9993,9994,9995,9996,9997,9998,10999] |