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 | 3 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | -1 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | -4 |
| 20 | 3 |
| 21 | 0 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 0 |
| 27 | 0 |
| 28 | -30 |
| 29 | 48 |
| 30 | -19 |
| 31 | 0 |
| 32 | 0 |
| 33 | 0 |
| 34 | 0 |
| 35 | 0 |
| 36 | -36 |
| 37 | -136 |
| 38 | 468 |
| 39 | -408 |
| 40 | 111 |
| 41 | 0 |
| 42 | 0 |
| 43 | 0 |
| 44 | -150 |
| 45 | -180 |
| 46 | -135 |
| 47 | 3240 |
| 48 | -5340 |
| 49 | 3260 |
| 50 | -696 |
| 51 | -132 |
| 52 | -414 |
| 53 | -612 |
| 54 | 696 |
| 55 | 1932 |
| 56 | 16158 |
| 57 | -51004 |
| 58 | 53919 |