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 | 2 |
| 2 | 2 |
| 3 | 727 |
| 4 | 79 |
| 5 | 241 |
| 6 | 727 |
| 7 | 823541 |
| 8 | 5764799 |
| 9 | 19681 |
| 10 | 16679880978199 |
| 11 | 31381059607 |
| 12 | 13841287199 |
| 13 | 42052983462257057 |
| 14 | 6103515623 |
| 15 | 4747561509941 |
| 16 | 28644003124274380508351359 |
| 17 | 98526125335693359373 |
| 18 | 136753052840548005895349735207879 |
| 19 | 22168378200531005859373 |