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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 14 |
| 5 | 38 |
| 6 | 111 |
| 7 | 332 |
| 8 | 1029 |
| 9 | 3232 |
| 10 | 10374 |
| 11 | 33679 |
| 12 | 110722 |
| 13 | 367252 |
| 14 | 1228558 |
| 15 | 4138120 |
| 16 | 14025473 |
| 17 | 47792389 |
| 18 | 163643066 |
| 19 | 562722427 |
| 20 | 1942548520 |
| 21 | 6729230281 |
| 22 | 23385132060 |
| 23 | 81503084084 |
| 24 | 284815902739 |
| 25 | 997741303308 |
| 26 | 3503112067273 |