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 | 3 |
| 2 | 89 |
| 3 | 887 |
| 4 | 9551 |
| 5 | 31397 |
| 6 | 492113 |
| 7 | 4652353 |
| 8 | 47326693 |
| 9 | 436273009 |
| 10 | 4302407359 |
| 11 | 42652618343 |
| 12 | 738832927927 |
| 13 | 7177162611713 |
| 14 | 90874329411493 |
| 15 | 218209405436543 |
| 16 | 1693182318746371 |
| 17 | 80873624627234849 |
| 18 | 804212830686677669 |