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 | 1 |
| 2 | -6 |
| 3 | 4 |
| 4 | 7 |
| 5 | -15 |
| 6 | 8 |
| 7 | 12 |
| 8 | -31 |
| 9 | 29 |
| 10 | 10 |
| 11 | -72 |
| 12 | 95 |
| 13 | -11 |
| 14 | -160 |
| 15 | 264 |
| 16 | -111 |
| 17 | -311 |
| 18 | 682 |
| 19 | -484 |
| 20 | -505 |
| 21 | 1673 |
| 22 | -1656 |
| 23 | -524 |
| 24 | 3857 |
| 25 | -4987 |
| 26 | 602 |
| 27 | 8240 |
| 28 | -13825 |
| 29 | 6189 |
| 30 | 15872 |
| 31 | -35888 |
| 32 | 26209 |
| 33 | 25553 |
| 34 | -87654 |
| 35 | 88308 |
| 36 | 24903 |
| 37 | -200863 |
| 38 | 264264 |
| 39 | -38500 |
| 40 | -426623 |
| 41 | 729389 |
| 42 | -341270 |
| 43 | -814744 |
| 44 | 1885407 |
| 45 | -1411931 |
| 46 | -1288224 |