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 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 11 |
| 7 | 27 |
| 8 | 60 |
| 9 | 152 |
| 10 | 376 |
| 11 | 968 |
| 12 | 2492 |
| 13 | 6549 |
| 14 | 17259 |
| 15 | 46000 |
| 16 | 123214 |
| 17 | 332304 |
| 18 | 900406 |
| 19 | 2451999 |
| 20 | 6703925 |