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 | 1 |
| 2 | 21 |
| 3 | 139 |
| 4 | 554 |
| 5 | 1645 |
| 6 | 4031 |
| 7 | 8631 |
| 8 | 16724 |
| 9 | 30009 |
| 10 | 50665 |
| 11 | 81411 |
| 12 | 125566 |
| 13 | 187109 |
| 14 | 270739 |
| 15 | 381935 |
| 16 | 527016 |
| 17 | 713201 |
| 18 | 948669 |
| 19 | 1242619 |
| 20 | 1605330 |
| 21 | 2048221 |
| 22 | 2583911 |
| 23 | 3226279 |
| 24 | 3990524 |
| 25 | 4893225 |
| 26 | 5952401 |
| 27 | 7187571 |
| 28 | 8619814 |
| 29 | 10271829 |
| 30 | 12167995 |
| 31 | 14334431 |
| 32 | 16799056 |
| 33 | 19591649 |