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 | 3 |
| 2 | 10 |
| 3 | 27 |
| 4 | 76 |
| 5 | 195 |
| 6 | 519 |
| 7 | 1299 |
| 8 | 3364 |
| 9 | 8311 |
| 10 | 21191 |
| 11 | 51981 |
| 12 | 131273 |
| 13 | 320715 |
| 14 | 804845 |
| 15 | 1961823 |
| 16 | 4901782 |
| 17 | 11932489 |
| 18 | 29719325 |
| 19 | 72291325 |
| 20 | 179610365 |
| 21 | 436699813 |
| 22 | 1082870377 |
| 23 | 2632116551 |
| 24 | 6516122403 |
| 25 | 15835522783 |
| 26 | 39147779575 |