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 | 2 |
| 2 | 3 |
| 3 | 6 |
| 4 | 8 |
| 5 | 21 |
| 6 | 23 |
| 7 | 50 |
| 8 | 105 |
| 9 | 143 |
| 10 | 221 |
| 11 | 634 |
| 12 | 770 |
| 13 | 1197 |
| 14 | 2996 |
| 15 | 5489 |
| 16 | 7129 |
| 17 | 18673 |
| 18 | 25236 |
| 19 | 46246 |
| 20 | 96437 |
| 21 | 179480 |
| 22 | 298091 |
| 23 | 425614 |