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 | 7 |
| 2 | 97 |
| 3 | 2023 |
| 4 | 56257 |
| 5 | 1955527 |
| 6 | 81570337 |
| 7 | 3969606823 |
| 8 | 220777431937 |
| 9 | 13813838801287 |
| 10 | 960354511044577 |
| 11 | 73441487204670823 |
| 12 | 6126887497334519617 |
| 13 | 553733062241471461447 |
| 14 | 53894653951229272883617 |
| 15 | 5620230710788836168938023 |
| 16 | 625160202763025501303191297 |