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 | 1 |
| 3 | 2 |
| 4 | 7 |
| 5 | 9 |
| 6 | 61 |
| 7 | 192 |
| 8 | 253 |
| 9 | 445 |
| 10 | 1143 |
| 11 | 1588 |
| 12 | 2731 |
| 13 | 4319 |
| 14 | 7050 |
| 15 | 25469 |
| 16 | 261740 |
| 17 | 287209 |
| 18 | 548949 |
| 19 | 836158 |
| 20 | 2221265 |
| 21 | 3057423 |
| 22 | 5278688 |
| 23 | 8336111 |
| 24 | 13614799 |
| 25 | 49180508 |
| 26 | 111975815 |
| 27 | 385107953 |
| 28 | 497083768 |
| 29 | 6847196937 |
| 30 | 48427462327 |
| 31 | 200557046245 |
| 32 | 248984508572 |
| 33 | 449541554817 |