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 | 0 |
| 3 | 1 |
| 4 | -1 |
| 5 | -1 |
| 6 | 2 |
| 7 | 4 |
| 8 | -3 |
| 9 | -3 |
| 10 | 4 |
| 11 | 1 |
| 12 | 6 |
| 13 | -8 |
| 14 | -9 |
| 15 | 8 |
| 16 | 7 |
| 17 | 5 |
| 18 | 15 |
| 19 | -20 |
| 20 | -20 |
| 21 | 16 |
| 22 | -1 |
| 23 | -3 |
| 24 | 18 |
| 25 | 37 |
| 26 | -48 |
| 27 | -46 |
| 28 | 32 |
| 29 | 26 |
| 30 | -6 |
| 31 | -19 |
| 32 | 57 |
| 33 | 95 |
| 34 | -112 |
| 35 | -99 |
| 36 | 64 |
| 37 | 1 |
| 38 | 16 |
| 39 | -32 |
| 40 | -80 |
| 41 | 160 |
| 42 | 233 |
| 43 | -256 |
| 44 | -213 |
| 45 | 128 |
| 46 | 86 |
| 47 | 9 |
| 48 | 54 |
| 49 | -120 |
| 50 | -254 |
| 51 | 432 |
| 52 | 566 |
| 53 | -576 |
| 54 | -450 |
| 55 | 256 |
| 56 | -1 |
| 57 | 14 |
| 58 | 50 |
| 59 | 174 |
| 60 | -400 |
| 61 | -746 |
| 62 | 1120 |
| 63 | 1344 |
| 64 | -1280 |
| 65 | -947 |
| 66 | 512 |