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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 7 |
| 5 | 13 |
| 6 | 31 |
| 7 | 61 |
| 8 | 144 |
| 9 | 296 |
| 10 | 714 |
| 11 | 1534 |
| 12 | 3761 |
| 13 | 8303 |
| 14 | 20495 |
| 15 | 46115 |
| 16 | 114461 |
| 17 | 261445 |
| 18 | 651114 |
| 19 | 1503207 |
| 20 | 3749017 |
| 21 | 8726147 |
| 22 | 21788311 |
| 23 | 51072555 |
| 24 | 127698665 |
| 25 | 301244477 |
| 26 | 754496298 |
| 27 | 1790598079 |
| 28 | 4494019431 |
| 29 | 10726676701 |
| 30 | 26983034009 |