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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 131584 |
| 3 | 193739769 |
| 4 | 34360262656 |
| 5 | 1907353515625 |
| 6 | 50780008567296 |
| 7 | 814206940192849 |
| 8 | 9007199791611904 |
| 9 | 75047319391891761 |
| 10 | 500000005000000000 |
| 11 | 2779958669714828041 |
| 12 | 13311666671401304064 |
| 13 | 56227703544907942489 |