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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 50 |
| 5 | 103 |
| 6 | 256 |
| 7 | 615 |
| 8 | 1486 |
| 9 | 2101 |
| 10 | 39304 |
| 11 | 80709 |
| 12 | 200722 |
| 13 | 2288651 |
| 14 | 2489373 |
| 15 | 4778024 |
| 16 | 12045421 |
| 17 | 52959708 |
| 18 | 65005129 |
| 19 | 1093041772 |
| 20 | 3344130445 |
| 21 | 7781302662 |
| 22 | 34469341093 |
| 23 | 731637465615 |
| 24 | 1497744272323 |
| 25 | 607318067756430 |