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 | 0 |
| 2 | 0 |
| 3 | 9 |
| 4 | 79 |
| 5 | 454 |
| 6 | 1566 |
| 7 | 4103 |
| 8 | 9009 |
| 9 | 17484 |
| 10 | 30984 |
| 11 | 51221 |
| 12 | 80163 |
| 13 | 120034 |
| 14 | 173314 |
| 15 | 242739 |
| 16 | 331301 |
| 17 | 442248 |
| 18 | 579084 |
| 19 | 745569 |
| 20 | 945719 |
| 21 | 1183806 |
| 22 | 1464358 |
| 23 | 1792159 |
| 24 | 2172249 |
| 25 | 2609924 |