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 | 2 |
| 2 | 6 |
| 3 | -2 |
| 4 | 30 |
| 5 | 14 |
| 6 | 30 |
| 7 | 238 |
| 8 | -66 |
| 9 | 782 |
| 10 | 990 |
| 11 | 46 |
| 12 | 8190 |
| 13 | -178 |
| 14 | 16926 |
| 15 | 48238 |
| 16 | -15810 |
| 17 | 247694 |
| 18 | 106590 |
| 19 | 262318 |
| 20 | 1932414 |
| 21 | -555058 |
| 22 | 6518430 |
| 23 | 7830766 |
| 24 | 765630 |
| 25 | 67043342 |
| 26 | -2865954 |
| 27 | 143077678 |
| 28 | 387537150 |
| 29 | -124309426 |
| 30 | 2044005150 |
| 31 | 807673198 |
| 32 | 2285861694 |
| 33 | 15681525902 |
| 34 | -4648416930 |