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 | 9 |
| 4 | 12 |
| 5 | 21 |
| 6 | 22 |
| 7 | 29 |
| 8 | 38 |
| 9 | 109 |
| 10 | 122 |
| 11 | 221 |
| 12 | 1191 |
| 13 | 20359 |
| 14 | 12017441 |
| 15 | 64352012 |
| 16 | 69362229 |
| 17 | 105741122 |
| 18 | 1347014779 |
| 19 | 10715008859 |
| 20 | 664190348029 |
| 21 | 940313186572 |
| 22 | 4263966676478 |
| 23 | 34479242283029 |
| 24 | 1055656895701022 |
| 25 | 2968363385585478 |