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 | 15 |
| 5 | 35 |
| 6 | 77 |
| 7 | 1463 |
| 8 | 1309 |
| 9 | 1001 |
| 10 | 4147 |
| 11 | 2093 |
| 12 | 19019 |
| 13 | 17017 |
| 14 | 39767 |
| 15 | 35581 |
| 16 | 323323 |
| 17 | 10023013 |
| 18 | 1339481 |
| 19 | 676039 |
| 20 | 20957209 |
| 21 | 2800733 |
| 22 | 86822723 |