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 | 11 |
| 2 | 60 |
| 3 | 228 |
| 4 | 690 |
| 5 | 1782 |
| 6 | 4092 |
| 7 | 8580 |
| 8 | 16731 |
| 9 | 30745 |
| 10 | 53768 |
| 11 | 90168 |
| 12 | 145860 |
| 13 | 228684 |
| 14 | 348840 |
| 15 | 519384 |
| 16 | 756789 |
| 17 | 1081575 |
| 18 | 1519012 |
| 19 | 2099900 |
| 20 | 2861430 |
| 21 | 3848130 |
| 22 | 5112900 |
| 23 | 6718140 |
| 24 | 8736975 |
| 25 | 11254581 |
| 26 | 14369616 |
| 27 | 18195760 |
| 28 | 22863368 |
| 29 | 28521240 |
| 30 | 35338512 |
| 31 | 43506672 |
| 32 | 53241705 |
| 33 | 64786371 |