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 | -1 |
| 3 | 6 |
| 4 | -5 |
| 5 | -1 |
| 6 | 27 |
| 7 | -31 |
| 8 | -11 |
| 9 | 1 |
| 10 | 167 |
| 11 | -252 |
| 12 | -136 |
| 13 | 28 |
| 14 | 1 |
| 15 | 1310 |
| 16 | -2491 |
| 17 | -1864 |
| 18 | 656 |
| 19 | 94 |
| 20 | -1 |
| 21 | 12394 |
| 22 | -28603 |
| 23 | -27583 |
| 24 | 13952 |
| 25 | 3718 |
| 26 | -421 |
| 27 | -1 |
| 28 | 137053 |
| 29 | -372765 |
| 30 | -440425 |
| 31 | 290431 |
| 32 | 113119 |
| 33 | -24739 |
| 34 | -2379 |
| 35 | 1 |
| 36 | 1733325 |
| 37 | -5433312 |
| 38 | -7596496 |
| 39 | 6162480 |
| 40 | 3142746 |
| 41 | -1010144 |
| 42 | -189768 |
| 43 | 16080 |
| 44 | 1 |