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 | -7 |
| 5 | 1 |
| 6 | 1 |
| 7 | 57 |
| 8 | 57 |
| 9 | 1 |
| 10 | 1 |
| 11 | -455 |
| 12 | 3705 |
| 13 | -455 |
| 14 | 1 |
| 15 | 1 |
| 16 | 3641 |
| 17 | 236665 |
| 18 | 236665 |
| 19 | 3641 |
| 20 | 1 |
| 21 | 1 |
| 22 | -29127 |
| 23 | 15150201 |
| 24 | -120935815 |
| 25 | 15150201 |
| 26 | -29127 |
| 27 | 1 |
| 28 | 1 |
| 29 | 233017 |
| 30 | 969583737 |
| 31 | 61934287481 |
| 32 | 61934287481 |
| 33 | 969583737 |
| 34 | 233017 |
| 35 | 1 |
| 36 | 1 |
| 37 | -1864135 |
| 38 | 62053592185 |