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) |
|---|---|
| 3 | 5 |
| 4 | 93 |
| 5 | 1030 |
| 6 | 8885 |
| 7 | 65954 |
| 8 | 442610 |
| 9 | 2762412 |
| 10 | 16322085 |
| 11 | 92400330 |
| 12 | 505403910 |
| 13 | 2687477780 |
| 14 | 13957496098 |
| 15 | 71053094420 |
| 16 | 355548314180 |
| 17 | 1752827693528 |
| 18 | 8529176056965 |
| 19 | 41026491589722 |
| 20 | 195327793313790 |
| 21 | 921451498774660 |
| 22 | 4311086414580022 |
| 23 | 20019238138410940 |