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) |
|---|---|
| 3 | 1 |
| 4 | 1 |
| 5 | 5 |
| 6 | 6 |
| 7 | 21 |
| 8 | 28 |
| 9 | 84 |
| 10 | 121 |
| 11 | 331 |
| 12 | 507 |
| 13 | 1300 |
| 14 | 2093 |
| 15 | 5110 |
| 16 | 8568 |
| 17 | 20129 |
| 18 | 34885 |
| 19 | 79477 |
| 20 | 141494 |
| 21 | 314489 |
| 22 | 572264 |
| 23 | 1246784 |
| 24 | 2309385 |
| 25 | 4950751 |
| 26 | 9303411 |
| 27 | 19684692 |
| 28 | 37427313 |
| 29 | 78354346 |
| 30 | 150402700 |
| 31 | 312168761 |
| 32 | 603861897 |
| 33 | 1244620149 |