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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 5 |
| 7 | 3 |
| 8 | 10 |
| 9 | 13 |
| 10 | 31 |
| 11 | 44 |
| 12 | 103 |
| 13 | 169 |
| 14 | 360 |
| 15 | 643 |
| 16 | 1317 |
| 17 | 2479 |
| 18 | 5036 |
| 19 | 9716 |
| 20 | 19592 |
| 21 | 38511 |
| 22 | 77465 |
| 23 | 153686 |
| 24 | 309093 |
| 25 | 617426 |
| 26 | 1243392 |
| 27 | 2496186 |
| 28 | 5035612 |