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 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 10 |
| 5 | 33 |
| 6 | 107 |
| 7 | 344 |
| 8 | 1103 |
| 9 | 3535 |
| 10 | 11330 |
| 11 | 36317 |
| 12 | 116415 |
| 13 | 373176 |
| 14 | 1196243 |
| 15 | 3834643 |
| 16 | 12292218 |
| 17 | 39403561 |
| 18 | 126310851 |
| 19 | 404898200 |
| 20 | 1297929287 |
| 21 | 4160602439 |
| 22 | 13337099986 |
| 23 | 42753000005 |
| 24 | 137047709879 |
| 25 | 439315949304 |
| 26 | 1408257777387 |