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 | 2 |
| 2 | 2 |
| 3 | 0 |
| 4 | -3 |
| 5 | -2 |
| 6 | 9 |
| 7 | 24 |
| 8 | 11 |
| 9 | -66 |
| 10 | -152 |
| 11 | -8 |
| 12 | 587 |
| 13 | 1082 |
| 14 | -438 |
| 15 | -5248 |
| 16 | -7733 |
| 17 | 7942 |
| 18 | 47502 |
| 19 | 53792 |
| 20 | -105313 |
| 21 | -430118 |
| 22 | -343043 |
| 23 | 1249800 |
| 24 | 3866557 |
| 25 | 1730018 |
| 26 | -13996096 |
| 27 | -34243896 |
| 28 | -1947203 |
| 29 | 150962374 |
| 30 | 296101865 |
| 31 | -121857184 |
| 32 | -1582561869 |
| 33 | -2468098042 |
| 34 | 2529520766 |