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 | 5 |
| 2 | 11 |
| 3 | 17 |
| 4 | 163 |
| 5 | 281 |
| 6 | 399601 |
| 7 | 406171 |
| 8 | 4454741 |
| 9 | 66015343 |
| 10 | 113805551 |
| 11 | 2187415801 |
| 12 | 161839204201 |
| 13 | 26736345945523 |
| 14 | 730696109214329201 |
| 15 | 1129355591957910557 |
| 16 | 358794420376997451601 |
| 17 | 295933385622217576048931 |
| 18 | 145312457840638814119077001 |