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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 2 |
| 4 | 10 |
| 5 | 2 |
| 6 | 34 |
| 7 | -82 |
| 8 | 46 |
| 9 | 302 |
| 10 | 814 |
| 11 | -262 |
| 12 | 1786 |
| 13 | -21838 |
| 14 | -13646 |
| 15 | 2738 |
| 16 | 35506 |
| 17 | -379438 |
| 18 | -248366 |
| 19 | -9175402 |
| 20 | -8651114 |
| 21 | -7602538 |
| 22 | -5505386 |
| 23 | -214704262 |
| 24 | -206315654 |
| 25 | -189538438 |
| 26 | -155984006 |
| 27 | -88875142 |
| 28 | 45342586 |
| 29 | -5932822318 |
| 30 | -5395951406 |
| 31 | -198413006482 |