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 | 43 |
| 3 | 969 |
| 4 | 23663 |
| 5 | 571099 |
| 6 | 13807469 |
| 7 | 333735575 |
| 8 | 8066926825 |
| 9 | 194989463233 |
| 10 | 4713185791699 |
| 11 | 113924706164937 |
| 12 | 2753729539353359 |
| 13 | 66561737202707371 |
| 14 | 1608896152717277333 |
| 15 | 38889412128248718215 |
| 16 | 940014912175876488361 |
| 17 | 22721558047666401897553 |
| 18 | 549213840574693856578267 |