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) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 2 |
| 4 | -2 |
| 5 | 14 |
| 6 | -2 |
| 7 | 146 |
| 8 | 82 |
| 9 | -46 |
| 10 | -302 |
| 11 | 1286 |
| 12 | 262 |
| 13 | 25934 |
| 14 | 21838 |
| 15 | 13646 |
| 16 | -2738 |
| 17 | 444974 |
| 18 | 379438 |
| 19 | 9437546 |
| 20 | 9175402 |
| 21 | 8651114 |
| 22 | 7602538 |
| 23 | 218898566 |
| 24 | 214704262 |
| 25 | 206315654 |
| 26 | 189538438 |
| 27 | 155984006 |
| 28 | 88875142 |
| 29 | 6201257774 |
| 30 | 5932822318 |
| 31 | 199486748306 |
| 32 | 198413006482 |
| 33 | 196265522834 |
| 34 | 191970555538 |