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 | 141 |
| 2 | 251 |
| 3 | 560 |
| 4 | 664807556 |
| 5 | 424710875510 |
| 6 | 863812804425 |
| 7 | 137134427278403350052 |
| 8 | 366828486147473227474 |
| 9 | 186740753582576522645847734 |