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 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 36 |
| 5 | 41 |
| 6 | 483 |
| 7 | 1541 |
| 8 | 4041 |
| 9 | 36908 |
| 10 | 127958 |
| 11 | 603136 |
| 12 | 1110753 |
| 13 | 1795333 |
| 14 | 3518005633 |
| 15 | 4046896633 |
| 16 | 11055868678 |
| 17 | 37045070336 |
| 18 | 47289885136 |
| 19 | 11563893709446 |
| 20 | 193226234301588 |
| 21 | 194000856277036 |
| 22 | 351621434534041 |