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 | 1 |
| 3 | 1 |
| 4 | -8 |
| 5 | 1 |
| 6 | 1 |
| 7 | 73 |
| 8 | 73 |
| 9 | 1 |
| 10 | 1 |
| 11 | -656 |
| 12 | 5986 |
| 13 | -656 |
| 14 | 1 |
| 15 | 1 |
| 16 | 5905 |
| 17 | 484210 |
| 18 | 484210 |
| 19 | 5905 |
| 20 | 1 |
| 21 | 1 |
| 22 | -53144 |
| 23 | 39226915 |
| 24 | -352504880 |
| 25 | 39226915 |
| 26 | -53144 |
| 27 | 1 |
| 28 | 1 |
| 29 | 478297 |
| 30 | 3177326971 |
| 31 | 257015284435 |
| 32 | 257015284435 |
| 33 | 3177326971 |
| 34 | 478297 |
| 35 | 1 |
| 36 | 1 |
| 37 | -4304672 |
| 38 | 257363962948 |