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 | 18 |
| 3 | 1046 |
| 4 | 108893 |
| 5 | 13701111 |
| 6 | 1808609113 |
| 7 | 241491378451 |
| 8 | 32332391658753 |
| 9 | 4331663509964171 |
| 10 | 580414863999963833 |
| 11 | 77774694477831007731 |
| 12 | 10421780348518296089713 |
| 13 | 1396517647955429913843931 |