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 | 1 |
| 5 | 3 |
| 6 | 4 |
| 7 | 3 |
| 8 | 1 |
| 9 | -2 |
| 10 | -6 |
| 11 | -8 |
| 12 | -8 |
| 13 | -8 |
| 14 | -5 |
| 15 | 2 |
| 16 | 8 |
| 17 | 12 |
| 18 | 17 |
| 19 | 22 |
| 20 | 23 |
| 21 | 17 |
| 22 | 7 |
| 23 | 0 |
| 24 | -7 |
| 25 | -22 |
| 26 | -40 |
| 27 | -51 |
| 28 | -53 |
| 29 | -49 |
| 30 | -45 |
| 31 | -42 |
| 32 | -30 |
| 33 | -4 |
| 34 | 30 |
| 35 | 65 |
| 36 | 90 |
| 37 | 100 |
| 38 | 112 |
| 39 | 137 |
| 40 | 157 |
| 41 | 152 |
| 42 | 120 |
| 43 | 71 |
| 44 | 18 |
| 45 | -33 |
| 46 | -80 |
| 47 | -125 |
| 48 | -187 |
| 49 | -275 |
| 50 | -357 |
| 51 | -401 |
| 52 | -407 |
| 53 | -380 |
| 54 | -327 |
| 55 | -269 |
| 56 | -221 |
| 57 | -171 |
| 58 | -75 |
| 59 | 102 |
| 60 | 322 |
| 61 | 515 |
| 62 | 669 |
| 63 | 801 |