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 | 5 |
| 4 | 14 |
| 5 | 43 |
| 6 | 143 |
| 7 | 510 |
| 8 | 1936 |
| 9 | 7774 |
| 10 | 32848 |
| 11 | 145398 |
| 12 | 671641 |
| 13 | 3227218 |
| 14 | 16084747 |
| 15 | 82955090 |
| 16 | 441773793 |
| 17 | 2424845273 |
| 18 | 13695855478 |
| 19 | 79485625385 |
| 20 | 473393639992 |
| 21 | 2889930405750 |
| 22 | 18064609329598 |
| 23 | 115513453404597 |
| 24 | 754956282308784 |
| 25 | 5039064184597772 |
| 26 | 34323984497482559 |