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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 5 |
| 6 | 16 |
| 7 | 42 |
| 8 | 99 |
| 9 | 220 |
| 10 | 476 |
| 11 | 1023 |
| 12 | 2201 |
| 13 | 4732 |
| 14 | 10102 |
| 15 | 21284 |
| 16 | 44103 |
| 17 | 89845 |
| 18 | 180354 |
| 19 | 358226 |
| 20 | 707561 |
| 21 | 1396560 |
| 22 | 2764906 |
| 23 | 5501807 |
| 24 | 11005363 |
| 25 | 22101301 |
| 26 | 44470622 |
| 27 | 89475559 |
| 28 | 179753753 |
| 29 | 360325116 |
| 30 | 720748862 |
| 31 | 1439561539 |
| 32 | 2873846383 |
| 33 | 5740501232 |
| 34 | 11484167472 |