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 | 7 |
| 2 | 87 |
| 3 | 741 |
| 4 | 6686 |
| 5 | 59126 |
| 6 | 528282 |
| 7 | 4738235 |
| 8 | 42321441 |
| 9 | 378112132 |
| 10 | 3379951089 |
| 11 | 30211913537 |
| 12 | 270034246073 |
| 13 | 2413553512560 |
| 14 | 21572510872955 |
| 15 | 192816992434886 |
| 16 | 1723410496604699 |
| 17 | 15403947766639408 |
| 18 | 137681484497162534 |