This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 199 |
| 2 | 499 |
| 3 | 599 |
| 4 | 919 |
| 5 | 929 |
| 6 | 991 |
| 7 | 997 |
| 8 | 1999 |
| 9 | 2999 |
| 10 | 4999 |
| 11 | 8999 |
| 12 | 9199 |
| 13 | 9929 |
| 14 | 9949 |
| 15 | 49999 |
| 16 | 59999 |
| 17 | 79999 |
| 18 | 94999 |
| 19 | 98999 |
| 20 | 99929 |
| 21 | 99989 |
| 22 | 99991 |
| 23 | 199999 |
| 24 | 599999 |
| 25 | 799999 |
| 26 | 989999 |
| 27 | 991999 |
| 28 | 999199 |
| 29 | 999499 |
| 30 | 999599 |
| 31 | 999959 |
| 32 | 999979 |
| 33 | 2999999 |
| 34 | 4999999 |
| 35 | 9899999 |