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) |
|---|---|
| 6 | 1 |
| 7 | 6 |
| 8 | 27 |
| 9 | 108 |
| 10 | 409 |
| 11 | 1558 |
| 12 | 5692 |
| 13 | 21328 |
| 14 | 76468 |
| 15 | 282885 |
| 16 | 999383 |
| 17 | 3656887 |
| 18 | 12772925 |
| 19 | 46306978 |
| 20 | 160408850 |
| 21 | 577077226 |
| 22 | 1987559778 |
| 23 | 7105490315 |
| 24 | 24379316121 |
| 25 | 86719101209 |
| 26 | 296819500851 |
| 27 | 1051663900480 |
| 28 | 3594472289644 |
| 29 | 12696988924724 |
| 30 | 43364647235536 |
| 31 | 152825304753761 |