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 | 3 |
| 3 | 8 |
| 4 | 33 |
| 5 | 138 |
| 6 | 563 |
| 7 | 2268 |
| 8 | 9093 |
| 9 | 36398 |
| 10 | 145623 |
| 11 | 582528 |
| 12 | 2330153 |
| 13 | 9320658 |
| 14 | 37282683 |
| 15 | 149130788 |
| 16 | 596523213 |
| 17 | 2386092918 |
| 18 | 9544371743 |
| 19 | 38177487048 |
| 20 | 152709948273 |
| 21 | 610839793178 |
| 22 | 2443359172803 |