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 | 4 |
| 2 | 18 |
| 3 | 353 |
| 4 | 7434 |
| 5 | 198052 |
| 6 | 5731144 |
| 7 | 172707247 |
| 8 | 5290686318 |
| 9 | 163203090770 |
| 10 | 5048858758020 |
| 11 | 156379568912461 |
| 12 | 4846014558069802 |
| 13 | 150203703987575008 |
| 14 | 4656019290676790496 |
| 15 | 144332757507860933195 |
| 16 | 4474265565293272517286 |