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 | 2 |
| 3 | -1 |
| 4 | 0 |
| 5 | 2 |
| 6 | -3 |
| 7 | 3 |
| 8 | -1 |
| 9 | -2 |
| 10 | 5 |
| 11 | -6 |
| 12 | 4 |
| 13 | 1 |
| 14 | -7 |
| 15 | 11 |
| 16 | -10 |
| 17 | 3 |
| 18 | 8 |
| 19 | -18 |
| 20 | 21 |
| 21 | -13 |
| 22 | -5 |
| 23 | 26 |
| 24 | -39 |
| 25 | 34 |
| 26 | -8 |
| 27 | -31 |
| 28 | 65 |
| 29 | -73 |
| 30 | 42 |
| 31 | 23 |
| 32 | -96 |
| 33 | 138 |
| 34 | -115 |
| 35 | 19 |
| 36 | 119 |
| 37 | -234 |
| 38 | 253 |
| 39 | -134 |
| 40 | -100 |
| 41 | 353 |
| 42 | -487 |
| 43 | 387 |
| 44 | -34 |
| 45 | -453 |
| 46 | 840 |
| 47 | -874 |
| 48 | 421 |
| 49 | 419 |
| 50 | -1293 |
| 51 | 1714 |
| 52 | -1295 |
| 53 | 2 |
| 54 | 1712 |
| 55 | -3007 |
| 56 | 3009 |
| 57 | -1297 |
| 58 | -1710 |
| 59 | 4719 |
| 60 | -6016 |