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 | 6 |
| 5 | 23 |
| 6 | 59 |
| 7 | 99 |
| 8 | 203 |
| 9 | 469 |
| 10 | 807 |
| 11 | 1615 |
| 12 | 3349 |
| 13 | 2266 |
| 14 | 4576 |
| 15 | 14042 |
| 16 | 25002 |
| 17 | 89193 |
| 18 | 131215 |
| 19 | 135904 |
| 20 | 814531 |
| 21 | 885682 |
| 22 | 60842 |
| 23 | 3969154 |
| 24 | 3370892 |
| 25 | 6742296 |
| 26 | 14350136 |
| 27 | 42766902 |
| 28 | 97565102 |
| 29 | 444197631 |
| 30 | 515121776 |
| 31 | 2085329975 |
| 32 | 2091732354 |
| 33 | 7999937231 |
| 34 | 14794305847 |