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 | 9 |
| 2 | 99 |
| 3 | 183 |
| 4 | 328 |
| 5 | 528 |
| 6 | 715 |
| 7 | 999 |
| 8 | 6099 |
| 9 | 9999 |
| 10 | 13224 |
| 11 | 40495 |
| 12 | 99999 |
| 13 | 106755 |
| 14 | 453288 |
| 15 | 999999 |
| 16 | 2066115 |
| 17 | 2975208 |
| 18 | 9999999 |
| 19 | 22145328 |
| 20 | 28027683 |
| 21 | 99999999 |
| 22 | 110213248 |
| 23 | 110667555 |
| 24 | 147928995 |
| 25 | 178838403 |
| 26 | 226123528 |
| 27 | 275074575 |
| 28 | 333052608 |
| 29 | 378698224 |
| 30 | 445332888 |
| 31 | 446245635 |
| 32 | 518348515 |