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 | 5 |
| 4 | 5 |
| 5 | -6 |
| 6 | -12 |
| 7 | -4 |
| 8 | 34 |
| 9 | 56 |
| 10 | 1 |
| 11 | -158 |
| 12 | -267 |
| 13 | 56 |
| 14 | 874 |
| 15 | 1234 |
| 16 | -691 |
| 17 | -4966 |
| 18 | -5796 |
| 19 | 6132 |
| 20 | 28411 |
| 21 | 26932 |
| 22 | -46687 |
| 23 | -162814 |
| 24 | -117746 |
| 25 | 332350 |
| 26 | 929348 |
| 27 | 454328 |
| 28 | -2278344 |
| 29 | -5259270 |
| 30 | -1250947 |
| 31 | 15199212 |
| 32 | 29375294 |
| 33 | -1279006 |
| 34 | -99217863 |
| 35 | -161079712 |
| 36 | 60427836 |
| 37 | 635914664 |