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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 13 |
| 6 | 23 |
| 7 | 42 |
| 8 | 76 |
| 9 | 139 |
| 10 | 255 |
| 11 | 471 |
| 12 | 873 |
| 13 | 1627 |
| 14 | 3044 |
| 15 | 5718 |
| 16 | 10779 |
| 17 | 20387 |
| 18 | 38673 |
| 19 | 73561 |
| 20 | 140267 |
| 21 | 268065 |
| 22 | 513349 |
| 23 | 984910 |
| 24 | 1892874 |
| 25 | 3643569 |
| 26 | 7023561 |
| 27 | 13557019 |
| 28 | 26200181 |
| 29 | 50691977 |
| 30 | 98182665 |
| 31 | 190353369 |
| 32 | 369393465 |
| 33 | 717457655 |