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 | 0 |
| 1 | 1 |
| 2 | -1 |
| 3 | -2 |
| 4 | 5 |
| 5 | 1 |
| 6 | -16 |
| 7 | 13 |
| 8 | 35 |
| 9 | -74 |
| 10 | -31 |
| 11 | 253 |
| 12 | -160 |
| 13 | -599 |
| 14 | 1079 |
| 15 | 718 |
| 16 | -3955 |
| 17 | 1801 |
| 18 | 10064 |
| 19 | -15467 |
| 20 | -14725 |
| 21 | 61126 |
| 22 | -16951 |
| 23 | -166427 |
| 24 | 217280 |
| 25 | 282001 |
| 26 | -933841 |
| 27 | 87838 |
| 28 | 2713685 |
| 29 | -2977199 |
| 30 | -5163856 |
| 31 | 14095453 |
| 32 | 1396115 |
| 33 | -43682474 |
| 34 | 39494129 |
| 35 | 91553293 |
| 36 | -210035680 |