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 | 9 |
| 3 | 251 |
| 4 | 2035 |
| 5 | 256103 |
| 6 | 28567 |
| 7 | 9822481 |
| 8 | 78708473 |
| 9 | 19148110939 |
| 10 | 19164113947 |
| 11 | 25523438671457 |
| 12 | 25535765062457 |
| 13 | 56123375845866029 |
| 14 | 56140429821090029 |
| 15 | 56154295334575853 |
| 16 | 449325761325072949 |
| 17 | 2207911834254200646437 |
| 18 | 245358578943756786493 |