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 | 0 |
| 1 | 1 |
| 2 | 0 |
| 3 | -1 |
| 4 | 2 |
| 5 | 0 |
| 6 | 3 |
| 7 | -2 |
| 8 | 4 |
| 9 | 0 |
| 10 | -5 |
| 11 | 6 |
| 12 | -4 |
| 13 | 8 |
| 14 | 0 |
| 15 | 11 |
| 16 | -10 |
| 17 | 12 |
| 18 | -8 |
| 19 | 16 |
| 20 | 0 |
| 21 | -21 |
| 22 | 22 |
| 23 | -20 |
| 24 | 24 |
| 25 | -16 |
| 26 | 32 |
| 27 | 0 |
| 28 | 43 |
| 29 | -42 |
| 30 | 44 |
| 31 | -40 |
| 32 | 48 |
| 33 | -32 |
| 34 | 64 |
| 35 | 0 |
| 36 | -85 |
| 37 | 86 |
| 38 | -84 |
| 39 | 88 |
| 40 | -80 |
| 41 | 96 |
| 42 | -64 |
| 43 | 128 |
| 44 | 0 |
| 45 | 171 |
| 46 | -170 |
| 47 | 172 |
| 48 | -168 |
| 49 | 176 |
| 50 | -160 |
| 51 | 192 |
| 52 | -128 |
| 53 | 256 |
| 54 | 0 |
| 55 | -341 |
| 56 | 342 |
| 57 | -340 |
| 58 | 344 |
| 59 | -336 |
| 60 | 352 |
| 61 | -320 |
| 62 | 384 |
| 63 | -256 |
| 64 | 512 |
| 65 | 0 |