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 | 1 |
| 1 | 4 |
| 2 | 7 |
| 3 | -44 |
| 4 | -527 |
| 5 | -3116 |
| 6 | -11753 |
| 7 | -16124 |
| 8 | 164833 |
| 9 | 1721764 |
| 10 | 9653287 |
| 11 | 34182196 |
| 12 | 32125393 |
| 13 | -597551756 |
| 14 | -5583548873 |
| 15 | -29729597084 |
| 16 | -98248054847 |
| 17 | -42744511676 |
| 18 | 2114245277767 |
| 19 | 17982575014036 |
| 20 | 91004468168113 |
| 21 | 278471369994004 |
| 22 | -47340744250793 |
| 23 | -7340510203856444 |
| 24 | -57540563024581727 |