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 | 22 |
| 4 | 276 |
| 5 | 1474 |
| 6 | 5248 |
| 7 | 14690 |
| 8 | 35012 |
| 9 | 74326 |
| 10 | 144544 |
| 11 | 262398 |
| 12 | 450580 |
| 13 | 739002 |
| 14 | 1166176 |
| 15 | 1780714 |
| 16 | 2642948 |
| 17 | 3826670 |
| 18 | 5420992 |
| 19 | 7532326 |
| 20 | 10286484 |
| 21 | 13830898 |
| 22 | 18336960 |
| 23 | 24002482 |
| 24 | 31054276 |
| 25 | 39750854 |
| 26 | 50385248 |
| 27 | 63287950 |