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 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 7 |
| 8 | 15 |
| 9 | 37 |
| 10 | 65 |
| 11 | 115 |
| 12 | 223 |
| 13 | 503 |
| 14 | 1127 |
| 15 | 2761 |
| 16 | 6225 |
| 17 | 15393 |
| 18 | 34915 |
| 19 | 84399 |
| 20 | 193489 |
| 21 | 477727 |
| 22 | 1113059 |
| 23 | 2753799 |
| 24 | 6486011 |
| 25 | 16181965 |
| 26 | 38447093 |
| 27 | 95995579 |