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 | 2 |
| 3 | 3 |
| 4 | 7 |
| 5 | 8 |
| 6 | 37 |
| 7 | 37 |
| 8 | 223 |
| 9 | 468 |
| 10 | 3203 |
| 11 | 6398 |
| 12 | 93103 |
| 13 | 178663 |
| 14 | 2282131 |
| 15 | 11561896 |
| 16 | 82120878 |
| 17 | 304719416 |
| 18 | 6316222138 |
| 19 | 17055376113 |
| 20 | 323332552319 |
| 21 | 1884432112761 |
| 22 | 20485110860448 |
| 23 | 87256977757852 |
| 24 | 2322728266726152 |
| 25 | 9277181270824996 |
| 26 | 159074512149044084 |
| 27 | 1122874592283076868 |