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) |
|---|---|
| 0 | 10 |
| 1 | 70 |
| 2 | 308 |
| 3 | 1092 |
| 4 | 3414 |
| 5 | 9834 |
| 6 | 26752 |
| 7 | 69784 |
| 8 | 176306 |
| 9 | 434382 |
| 10 | 1048812 |
| 11 | 2490636 |
| 12 | 5833006 |
| 13 | 13500754 |
| 14 | 30933368 |
| 15 | 70255008 |
| 16 | 158335434 |
| 17 | 354419190 |
| 18 | 788529700 |
| 19 | 1744831060 |
| 20 | 3841983110 |
| 21 | 8422163130 |
| 22 | 18387829488 |