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 | 16 |
| 3 | 84 |
| 4 | 412 |
| 5 | 1416 |
| 6 | 3640 |
| 7 | 7928 |
| 8 | 15384 |
| 9 | 27352 |
| 10 | 45432 |
| 11 | 71480 |
| 12 | 107608 |
| 13 | 156184 |
| 14 | 219832 |
| 15 | 301432 |
| 16 | 404120 |
| 17 | 531288 |
| 18 | 686584 |
| 19 | 873912 |
| 20 | 1097432 |
| 21 | 1361560 |
| 22 | 1670968 |
| 23 | 2030584 |
| 24 | 2445592 |
| 25 | 2921432 |