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 | 2 |
| 2 | 30 |
| 3 | 260 |
| 4 | 2316 |
| 5 | 20719 |
| 6 | 186565 |
| 7 | 1694033 |
| 8 | 15522194 |
| 9 | 143359184 |
| 10 | 1332981873 |
| 11 | 12466196499 |
| 12 | 117165976234 |
| 13 | 1105961883514 |
| 14 | 10478813824875 |
| 15 | 99613913708218 |
| 16 | 949727471728542 |