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 | 1 |
| 2 | 8 |
| 3 | 57 |
| 4 | 1292 |
| 5 | 7135 |
| 6 | 325560 |
| 7 | 4894715 |
| 8 | 125078632 |
| 9 | 1190664342 |
| 10 | 137798986920 |
| 11 | 1587893097945 |
| 12 | 258558380321076 |
| 13 | 3497709055775649 |
| 14 | 50821738502398864 |
| 15 | 1578753057237451095 |
| 16 | 443765620067972169968 |
| 17 | 7782162960545369351956 |
| 18 | 2741163034641146307693072 |
| 19 | 53564617257321061756508358 |
| 20 | 1100369599246721484969558920 |