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 | 2 |
| 2 | 12 |
| 3 | 18 |
| 4 | 40 |
| 5 | 56 |
| 6 | 304 |
| 7 | 550 |
| 8 | 748 |
| 9 | 1504 |
| 10 | 3230 |
| 11 | 3770 |
| 12 | 6976 |
| 13 | 29824 |
| 14 | 124672 |
| 15 | 351351 |
| 16 | 382772 |
| 17 | 510464 |
| 18 | 537248 |
| 19 | 698528 |
| 20 | 791264 |
| 21 | 1081568 |
| 22 | 1279136 |
| 23 | 2065408 |
| 24 | 2279072 |
| 25 | 211855016 |
| 26 | 561841408 |
| 27 | 731378944 |
| 28 | 3365232128 |
| 29 | 3557004544 |