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 | 25 |
| 3 | 152 |
| 4 | 1633 |
| 5 | 17050 |
| 6 | 282594 |
| 7 | 4785156 |
| 8 | 101751713 |
| 9 | 2359920499 |
| 10 | 62200947098 |
| 11 | 1792160571184 |
| 12 | 56765070083650 |
| 13 | 1946195069953698 |
| 14 | 72080471103601322 |
| 15 | 2862427829603252768 |
| 16 | 121449533922042173249 |
| 17 | 5480386857784931326102 |
| 18 | 262149577935595805876315 |