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 | -6 |
| 2 | 15 |
| 3 | -24 |
| 4 | 39 |
| 5 | -72 |
| 6 | 123 |
| 7 | -192 |
| 8 | 294 |
| 9 | -456 |
| 10 | 693 |
| 11 | -1008 |
| 12 | 1452 |
| 13 | -2100 |
| 14 | 2991 |
| 15 | -4176 |
| 16 | 5781 |
| 17 | -7992 |
| 18 | 10950 |
| 19 | -14808 |
| 20 | 19908 |
| 21 | -26688 |
| 22 | 35541 |
| 23 | -46944 |
| 24 | 61692 |
| 25 | -80826 |
| 26 | 105366 |
| 27 | -136536 |
| 28 | 176208 |
| 29 | -226728 |
| 30 | 290565 |
| 31 | -370704 |
| 32 | 471318 |
| 33 | -597600 |
| 34 | 755217 |
| 35 | -950976 |
| 36 | 1193988 |