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 | 1 |
| 3 | 5 |
| 4 | 161 |
| 5 | 1772 |
| 6 | 3097 |
| 7 | 3473 |
| 8 | 23084 |
| 9 | 38752 |
| 10 | 335165 |
| 11 | 491729 |
| 12 | 38248700 |
| 13 | 49050536 |
| 14 | 95305397 |
| 15 | 1019659805 |
| 16 | 1549919921 |
| 17 | 2973640172 |
| 18 | 4527000701 |
| 19 | 6300121204 |
| 20 | 10663850980 |
| 21 | 30980417576 |
| 22 | 40783699961 |
| 23 | 57033894608 |
| 24 | 409565230433 |