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 | 5 |
| 2 | 340 |
| 3 | 17936 |
| 4 | 542940 |
| 5 | 8821464 |
| 6 | 112139348 |
| 7 | 1135042936 |
| 8 | 15078628680 |
| 9 | 249568483336 |
| 10 | 2294594493868 |
| 11 | 25866958553904 |