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 | -76 |
| 2 | -702 |
| 3 | -5224 |
| 4 | -23425 |
| 5 | -98172 |
| 6 | -336450 |
| 7 | -1094152 |
| 8 | -3188349 |
| 9 | -8913752 |
| 10 | -23247294 |
| 11 | -58610304 |
| 12 | -140786308 |
| 13 | -328793172 |
| 14 | -740736900 |
| 15 | -1629664840 |
| 16 | -3486187003 |
| 17 | -7307990208 |
| 18 | -14976155896 |
| 19 | -30157221352 |
| 20 | -59594117256 |
| 21 | -115975615160 |
| 22 | -222119374922 |
| 23 | -419704427016 |