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 | 0 |
| 2 | -2 |
| 3 | -9 |
| 4 | -44 |
| 5 | -215 |
| 6 | -1001 |
| 7 | -4446 |
| 8 | -19058 |
| 9 | -79677 |
| 10 | -327418 |
| 11 | -1329601 |
| 12 | -5355272 |
| 13 | -21446945 |
| 14 | -85548138 |
| 15 | -340268656 |
| 16 | -1350664731 |
| 17 | -5353389340 |
| 18 | -21195056584 |
| 19 | -83846301409 |
| 20 | -331483318257 |
| 21 | -1309872510973 |
| 22 | -5174049465897 |
| 23 | -20431456722794 |
| 24 | -80660347594658 |