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 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 15 |
| 5 | 36 |
| 6 | 87 |
| 7 | 211 |
| 8 | 519 |
| 9 | 1285 |
| 10 | 3198 |
| 11 | 7998 |
| 12 | 20079 |
| 13 | 50571 |
| 14 | 127725 |
| 15 | 323367 |
| 16 | 820407 |
| 17 | 2085306 |
| 18 | 5309169 |
| 19 | 13537045 |
| 20 | 34561890 |
| 21 | 88347091 |
| 22 | 226079208 |
| 23 | 579110262 |
| 24 | 1484766015 |
| 25 | 3809948461 |
| 26 | 9783998877 |
| 27 | 25143452881 |
| 28 | 64658016249 |
| 29 | 166375274790 |