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 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 32 |
| 5 | 167 |
| 6 | 1096 |
| 7 | 8117 |
| 8 | 67859 |
| 9 | 627649 |
| 10 | 6394781 |
| 11 | 71201812 |
| 12 | 861677250 |
| 13 | 11270215084 |
| 14 | 158564826122 |
| 15 | 2389093936957 |
| 16 | 38396351412220 |
| 17 | 655832914215010 |
| 18 | 11865953978478454 |
| 19 | 226724258401651143 |
| 20 | 4562163514498852598 |
| 21 | 96430112680094188086 |
| 22 | 2136024671422363671272 |