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 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | -20 |
| 6 | -18 |
| 7 | -14 |
| 8 | -8 |
| 9 | -81 |
| 10 | -80 |
| 11 | -154 |
| 12 | -216 |
| 13 | -260 |
| 14 | 3640 |
| 15 | 3240 |
| 16 | 2464 |
| 17 | 1360 |
| 18 | 26244 |
| 19 | 25840 |
| 20 | 49280 |
| 21 | 68040 |
| 22 | 80080 |
| 23 | -1841840 |
| 24 | -1632960 |
| 25 | -1232000 |
| 26 | -671840 |
| 27 | -19131876 |
| 28 | -18811520 |
| 29 | -35728000 |
| 30 | -48988800 |
| 31 | -57097040 |
| 32 | 1827105280 |
| 33 | 1616630400 |
| 34 | 1214752000 |
| 35 | 658403200 |
| 36 | 24794911296 |
| 37 | 24360918400 |