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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 8 |
| 6 | 24 |
| 7 | 30 |
| 8 | 74 |
| 9 | 110 |
| 10 | 219 |
| 11 | 309 |
| 12 | 651 |
| 13 | 870 |
| 14 | 1608 |
| 15 | 2394 |
| 16 | 4085 |
| 17 | 5756 |
| 18 | 9931 |
| 19 | 13785 |
| 20 | 22724 |
| 21 | 32300 |
| 22 | 50404 |
| 23 | 70862 |
| 24 | 111540 |
| 25 | 153756 |
| 26 | 232868 |
| 27 | 326259 |
| 28 | 484090 |
| 29 | 667015 |
| 30 | 986082 |
| 31 | 1345566 |
| 32 | 1951216 |
| 33 | 2673588 |
| 34 | 3805742 |
| 35 | 5179213 |
| 36 | 7348514 |
| 37 | 9895254 |
| 38 | 13845750 |
| 39 | 18681896 |