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 | 8 |
| 3 | 18 |
| 4 | 38 |
| 5 | 76 |
| 6 | 147 |
| 7 | 279 |
| 8 | 523 |
| 9 | 973 |
| 10 | 1802 |
| 11 | 3328 |
| 12 | 6136 |
| 13 | 11302 |
| 14 | 20805 |
| 15 | 38285 |
| 16 | 70437 |
| 17 | 129575 |
| 18 | 238348 |
| 19 | 438414 |
| 20 | 806394 |
| 21 | 1483216 |
| 22 | 2728087 |
| 23 | 5017763 |
| 24 | 9229135 |
| 25 | 16975057 |
| 26 | 31222030 |