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) |
|---|---|
| 3 | 3 |
| 4 | 4 |
| 5 | 185 |
| 6 | 1026 |
| 7 | 30457 |
| 8 | 362664 |
| 9 | 10245825 |
| 10 | 195060070 |
| 11 | 5907674201 |
| 12 | 153676400076 |
| 13 | 5199628119985 |
| 14 | 169205814335754 |
| 15 | 6462995557999905 |
| 16 | 249877775352089296 |
| 17 | 10749867848389013249 |
| 18 | 478345428286978038606 |
| 19 | 23013713995857481324969 |