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 | 69 |
| 2 | 1630 |
| 3 | 33540 |
| 4 | 642953 |
| 5 | 11757774 |
| 6 | 207535740 |
| 7 | 3568229516 |
| 8 | 60064451704 |
| 9 | 994081203872 |
| 10 | 16221664901551 |
| 11 | 261576061692669 |
| 12 | 4174923985695564 |
| 13 | 66040940309213362 |
| 14 | 1036456712144381487 |
| 15 | 16152737625133763191 |