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 | 5 |
| 2 | 11 |
| 3 | 29 |
| 4 | 79 |
| 5 | 216 |
| 6 | 590 |
| 7 | 1609 |
| 8 | 4381 |
| 9 | 11911 |
| 10 | 32339 |
| 11 | 87690 |
| 12 | 237496 |
| 13 | 642509 |
| 14 | 1736399 |
| 15 | 4688081 |
| 16 | 12645655 |
| 17 | 34080924 |
| 18 | 91775426 |
| 19 | 246948241 |
| 20 | 663999649 |
| 21 | 1784138875 |
| 22 | 4790751131 |
| 23 | 12856028814 |
| 24 | 34478744044 |
| 25 | 92416515221 |