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 | 3 |
| 1 | 6 |
| 2 | -12 |
| 3 | -37 |
| 4 | 103369 |
| 5 | 1298 |
| 6 | 3173 |
| 7 | 119 |
| 8 | 568338 |
| 9 | -2377 |
| 10 | 4271976 |
| 11 | 3671 |
| 12 | 2966929 |
| 13 | 4679 |
| 14 | 3755 |
| 15 | 411547076 |
| 16 | -7548356 |
| 17 | -742070 |
| 18 | 131900 |
| 19 | 108983 |
| 20 | 13988275 |
| 21 | 198923609 |
| 22 | 54008 |
| 23 | 2194971 |
| 24 | 689148781190 |
| 25 | 1587713977705 |
| 26 | 6700494215 |
| 27 | 2691971279 |
| 28 | 1226979802842339 |
| 29 | -297697344982 |