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) |
|---|---|
| 0 | 0 |
| 1 | 9 |
| 2 | 45 |
| 3 | 108 |
| 4 | 198 |
| 5 | 315 |
| 6 | 459 |
| 7 | 630 |
| 8 | 828 |
| 9 | 1053 |
| 10 | 1305 |
| 11 | 1584 |
| 12 | 1890 |
| 13 | 2223 |
| 14 | 2583 |
| 15 | 2970 |
| 16 | 3384 |
| 17 | 3825 |
| 18 | 4293 |
| 19 | 4788 |
| 20 | 5310 |
| 21 | 5859 |
| 22 | 6435 |
| 23 | 7038 |
| 24 | 7668 |
| 25 | 8325 |
| 26 | 9009 |
| 27 | 9720 |
| 28 | 10458 |
| 29 | 11223 |
| 30 | 12015 |
| 31 | 12834 |
| 32 | 13680 |
| 33 | 14553 |
| 34 | 15453 |
| 35 | 16380 |
| 36 | 17334 |
| 37 | 18315 |
| 38 | 19323 |