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 | 0 |
| 2 | -1 |
| 3 | -2 |
| 4 | -2 |
| 5 | 1 |
| 6 | 10 |
| 7 | 29 |
| 8 | 63 |
| 9 | 117 |
| 10 | 191 |
| 11 | 265 |
| 12 | 264 |
| 13 | -12 |
| 14 | -1014 |
| 15 | -3654 |
| 16 | -9634 |
| 17 | -21929 |
| 18 | -45424 |
| 19 | -87551 |
| 20 | -158289 |
| 21 | -267616 |
| 22 | -415513 |
| 23 | -563200 |
| 24 | -561430 |
| 25 | 12625 |
| 26 | 2202084 |
| 27 | 8368243 |
| 28 | 23532027 |
| 29 | 57848882 |
| 30 | 131000395 |
| 31 | 279675274 |
| 32 | 569701663 |
| 33 | 1114392742 |
| 34 | 2099105261 |
| 35 | 3805794420 |