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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | -1 |
| 6 | 1 |
| 7 | 0 |
| 8 | 4 |
| 9 | -5 |
| 10 | 1 |
| 11 | 24 |
| 12 | -16 |
| 13 | 4 |
| 14 | -13 |
| 15 | 1 |
| 16 | -8 |
| 17 | 40 |
| 18 | -48 |
| 19 | 4 |
| 20 | -29 |
| 21 | 1 |
| 22 | 104 |
| 23 | -88 |
| 24 | 72 |
| 25 | -112 |
| 26 | 4 |
| 27 | -61 |
| 28 | 1 |
| 29 | -48 |
| 30 | 184 |
| 31 | -248 |
| 32 | 136 |
| 33 | -240 |
| 34 | 4 |
| 35 | -125 |
| 36 | 1 |
| 37 | 352 |
| 38 | -400 |
| 39 | 344 |
| 40 | -568 |
| 41 | 264 |
| 42 | -496 |
| 43 | 4 |
| 44 | -253 |
| 45 | 1 |
| 46 | 80 |
| 47 | 544 |
| 48 | -1104 |
| 49 | 664 |
| 50 | -1208 |
| 51 | 520 |
| 52 | -1008 |
| 53 | 4 |
| 54 | -509 |
| 55 | 1 |
| 56 | 1424 |
| 57 | -784 |
| 58 | 928 |
| 59 | -2512 |
| 60 | 1304 |
| 61 | -2488 |
| 62 | 1032 |
| 63 | -2032 |
| 64 | 4 |
| 65 | -1021 |
| 66 | 1 |