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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 8 |
| 5 | 19 |
| 6 | 41 |
| 7 | 101 |
| 8 | 240 |
| 9 | 614 |
| 10 | 1782 |
| 11 | 5024 |
| 12 | 15492 |
| 13 | 48859 |
| 14 | 150069 |
| 15 | 470216 |
| 16 | 1557591 |
| 17 | 5405758 |
| 18 | 18319515 |
| 19 | 64600395 |
| 20 | 229331402 |
| 21 | 797199637 |
| 22 | 2862671427 |
| 23 | 10330509932 |
| 24 | 38308974332 |
| 25 | 148638820408 |