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 | -2 |
| 4 | 3 |
| 5 | 2 |
| 6 | -4 |
| 7 | -4 |
| 8 | 5 |
| 9 | 8 |
| 10 | -8 |
| 11 | -10 |
| 12 | 11 |
| 13 | 12 |
| 14 | -15 |
| 15 | -18 |
| 16 | 22 |
| 17 | 26 |
| 18 | -29 |
| 19 | -34 |
| 20 | 38 |
| 21 | 42 |
| 22 | -51 |
| 23 | -56 |
| 24 | 66 |
| 25 | 78 |
| 26 | -85 |
| 27 | -98 |
| 28 | 109 |
| 29 | 120 |
| 30 | -139 |
| 31 | -156 |
| 32 | 176 |
| 33 | 202 |
| 34 | -222 |
| 35 | -250 |
| 36 | 279 |
| 37 | 306 |
| 38 | -346 |
| 39 | -384 |
| 40 | 429 |
| 41 | 482 |
| 42 | -530 |
| 43 | -590 |
| 44 | 650 |
| 45 | 714 |
| 46 | -797 |
| 47 | -876 |
| 48 | 972 |
| 49 | 1080 |
| 50 | -1180 |
| 51 | -1304 |
| 52 | 1431 |
| 53 | 1562 |
| 54 | -1728 |
| 55 | -1892 |
| 56 | 2078 |
| 57 | 2290 |
| 58 | -2496 |