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 | 1 |
| 2 | 32 |
| 3 | 4 |
| 4 | 12 |
| 5 | 64 |
| 6 | 62 |
| 7 | 204 |
| 8 | 744 |
| 9 | 900 |
| 10 | 2996 |
| 11 | 9564 |
| 12 | 14880 |
| 13 | 45124 |
| 14 | 129796 |
| 15 | 240124 |
| 16 | 683372 |
| 17 | 1837592 |
| 18 | 3790988 |
| 19 | 10329636 |
| 20 | 26707488 |
| 21 | 59005404 |
| 22 | 155944784 |
| 23 | 394374956 |
| 24 | 909596688 |
| 25 | 2353555396 |
| 26 | 5880643036 |
| 27 | 13932609908 |
| 28 | 35527598224 |
| 29 | 88215135628 |