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 | 7 |
| 2 | 17 |
| 3 | 81 |
| 4 | 118 |
| 5 | 2771 |
| 6 | 4737 |
| 7 | 63457 |
| 8 | -1270924 |
| 9 | 161636091 |
| 10 | -464743285 |
| 11 | 254905515589 |
| 12 | -3006818262414 |
| 13 | 299981806371451 |
| 14 | -83955854172826681 |
| 15 | 38482697321210434701 |
| 16 | -1458143803622109300584 |
| 17 | 83247435772128371635117 |