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 | 4 |
| 3 | 141 |
| 4 | 144 |
| 5 | 286 |
| 6 | 9055 |
| 7 | 16795 |
| 8 | 44944 |
| 9 | 90598 |
| 10 | 167579 |
| 11 | 15100424 |
| 12 | 29678424 |
| 13 | 45637726 |
| 14 | 283245880 |
| 15 | 5291767266 |
| 16 | 1442505046119 |
| 17 | 45042455839799 |
| 18 | 151069595909375 |
| 19 | 14429213707617199 |
| 20 | 90999011435291333 |