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) |
|---|---|
| 1 | 1 |
| 2 | -4 |
| 3 | 1 |
| 4 | 26 |
| 5 | -12 |
| 6 | 1 |
| 7 | -234 |
| 8 | 152 |
| 9 | -24 |
| 10 | 1 |
| 11 | 2696 |
| 12 | -2210 |
| 13 | 500 |
| 14 | -40 |
| 15 | 1 |
| 16 | -37919 |
| 17 | 36976 |
| 18 | -10710 |
| 19 | 1240 |
| 20 | -60 |
| 21 | 1 |
| 22 | 630521 |
| 23 | -704837 |
| 24 | 245896 |
| 25 | -36750 |
| 26 | 2590 |
| 27 | -84 |
| 28 | 1 |
| 29 | -12111114 |
| 30 | 15132932 |
| 31 | -6120324 |
| 32 | 1109696 |
| 33 | -101500 |
| 34 | 4816 |
| 35 | -112 |
| 36 | 1 |
| 37 | 264051201 |
| 38 | -362099010 |
| 39 | 165387680 |
| 40 | -34990620 |
| 41 | 3901296 |
| 42 | -241164 |
| 43 | 8232 |
| 44 | -144 |
| 45 | 1 |