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 | 11 |
| 2 | 121 |
| 3 | 671 |
| 4 | 4961 |
| 5 | 34111 |
| 6 | 241153 |
| 7 | 1690623 |
| 8 | 11888129 |
| 9 | 83512319 |
| 10 | 586864641 |
| 11 | 4123582463 |
| 12 | 28975366145 |
| 13 | 203599740927 |
| 14 | 1430630760449 |
| 15 | 10052572086271 |
| 16 | 70636158713857 |
| 17 | 496337248845823 |
| 18 | 3487600190423041 |
| 19 | 24506230080798719 |