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 | 30 |
| 3 | 753 |
| 4 | 39048 |
| 5 | 3656439 |
| 6 | 562400370 |
| 7 | 132584434941 |
| 8 | 45454204428636 |
| 9 | 21747608978702595 |
| 10 | 14048768969900622150 |
| 11 | 11925183926773031604489 |
| 12 | 13003120724393838963734064 |
| 13 | 17866681950868968379286259471 |