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 | 8 |
| 3 | 38 |
| 4 | 140 |
| 5 | 638 |
| 6 | 3032 |
| 7 | 14258 |
| 8 | 70136 |
| 9 | 350594 |
| 10 | 1767452 |
| 11 | 9029918 |
| 12 | 46519544 |
| 13 | 241210598 |
| 14 | 1258499756 |
| 15 | 6598909298 |
| 16 | 34748813672 |
| 17 | 183679125026 |
| 18 | 974136322892 |
| 19 | 5181534476414 |
| 20 | 27634187724392 |
| 21 | 147730324961126 |
| 22 | 791463055043228 |