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 | 7 |
| 2 | 156 |
| 3 | 6162 |
| 4 | 345818 |
| 5 | 25120872 |
| 6 | 2237952687 |
| 7 | 236084694122 |
| 8 | 28771727614749 |
| 9 | 3977205817386553 |
| 10 | 614815375624938276 |
| 11 | 105089416995538138498 |
| 12 | 19679693805738843682351 |
| 13 | 4006775128162674717660622 |