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 | 2 |
| 2 | 11 |
| 3 | 94 |
| 4 | 1072 |
| 5 | 15212 |
| 6 | 257777 |
| 7 | 5074738 |
| 8 | 113775490 |
| 9 | 2861365660 |
| 10 | 79763482974 |
| 11 | 2440866020252 |
| 12 | 81343355108428 |
| 13 | 2932370770780016 |
| 14 | 113695507437209845 |
| 15 | 4717853729131352186 |
| 16 | 208615291319607614600 |
| 17 | 9792578421235713418464 |