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) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 193 |
| 3 | 1552 |
| 4 | 37441 |
| 5 | 301080 |
| 6 | 7263361 |
| 7 | 58407968 |
| 8 | 1409054593 |
| 9 | 11330844712 |
| 10 | 273349327681 |
| 11 | 2198125466160 |
| 12 | 53028360515521 |
| 13 | 426425009590328 |
| 14 | 10287228590683393 |
| 15 | 82724253735057472 |
| 16 | 1995669318232062721 |
| 17 | 16048078799591559240 |
| 18 | 387149560508429484481 |