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 | 0 |
| 2 | 23 |
| 3 | 119 |
| 4 | 168 |
| 5 | 547 |
| 6 | 2079 |
| 7 | 6322 |
| 8 | 17903 |
| 9 | 53665 |
| 10 | 177334 |
| 11 | 555813 |
| 12 | 1667489 |
| 13 | 5141358 |
| 14 | 16219859 |
| 15 | 50536643 |
| 16 | 155427826 |
| 17 | 481370601 |
| 18 | 1501569819 |
| 19 | 4667505936 |
| 20 | 14454412939 |
| 21 | 44845109069 |
| 22 | 139426950850 |
| 23 | 433097541907 |
| 24 | 1343835090319 |
| 25 | 4171764326604 |