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 | 1 |
| 2 | 127 |
| 3 | 2060 |
| 4 | 14324 |
| 5 | 63801 |
| 6 | 216135 |
| 7 | 607408 |
| 8 | 1489744 |
| 9 | 3293225 |
| 10 | 6706775 |
| 11 | 12780396 |
| 12 | 23051412 |
| 13 | 39697105 |
| 14 | 65716399 |
| 15 | 105142976 |
| 16 | 163292480 |
| 17 | 247046193 |
| 18 | 365173839 |
| 19 | 528697900 |
| 20 | 751302100 |
| 21 | 1049786441 |
| 22 | 1444571447 |
| 23 | 1960254000 |