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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 3 |
| 7 | 10 |
| 8 | 28 |
| 9 | 71 |
| 10 | 165 |
| 11 | 361 |
| 12 | 754 |
| 13 | 1503 |
| 14 | 2893 |
| 15 | 5393 |
| 16 | 9773 |
| 17 | 17273 |
| 18 | 29860 |
| 19 | 50557 |
| 20 | 84024 |
| 21 | 137228 |
| 22 | 220542 |
| 23 | 349128 |
| 24 | 544980 |
| 25 | 839453 |