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 | -3 |
| 3 | 7 |
| 4 | -15 |
| 5 | 30 |
| 6 | -57 |
| 7 | 104 |
| 8 | -183 |
| 9 | 313 |
| 10 | -522 |
| 11 | 852 |
| 12 | -1365 |
| 13 | 2150 |
| 14 | -3336 |
| 15 | 5106 |
| 16 | -7719 |
| 17 | 11538 |
| 18 | -17067 |
| 19 | 25004 |
| 20 | -36306 |
| 21 | 52280 |
| 22 | -74700 |
| 23 | 105960 |
| 24 | -149277 |
| 25 | 208951 |
| 26 | -290706 |
| 27 | 402127 |
| 28 | -553224 |
| 29 | 757158 |
| 30 | -1031166 |
| 31 | 1397744 |
| 32 | -1886151 |
| 33 | 2534316 |
| 34 | -3391254 |
| 35 | 4520112 |
| 36 | -6002007 |