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 | 8 |
| 4 | 14 |
| 5 | 50 |
| 6 | 86 |
| 7 | 302 |
| 8 | 518 |
| 9 | 1814 |
| 10 | 3110 |
| 11 | 10886 |
| 12 | 18662 |
| 13 | 65318 |
| 14 | 111974 |
| 15 | 391910 |
| 16 | 671846 |
| 17 | 2351462 |
| 18 | 4031078 |
| 19 | 14108774 |
| 20 | 24186470 |
| 21 | 84652646 |
| 22 | 145118822 |
| 23 | 507915878 |
| 24 | 870712934 |
| 25 | 3047495270 |
| 26 | 5224277606 |
| 27 | 18284971622 |
| 28 | 31345665638 |
| 29 | 109709829734 |
| 30 | 188073993830 |
| 31 | 658258978406 |