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 | -26 |
| 4 | 45 |
| 5 | -66 |
| 6 | 82 |
| 7 | -120 |
| 8 | 156 |
| 9 | -170 |
| 10 | 231 |
| 11 | -276 |
| 12 | 290 |
| 13 | -390 |
| 14 | 435 |
| 15 | -438 |
| 16 | 561 |
| 17 | -630 |
| 18 | 651 |
| 19 | -780 |
| 20 | 861 |
| 21 | -842 |
| 22 | 1020 |
| 23 | -1170 |
| 24 | 1095 |
| 25 | -1326 |
| 26 | 1431 |
| 27 | -1370 |
| 28 | 1716 |
| 29 | -1740 |
| 30 | 1682 |
| 31 | -2016 |
| 32 | 2145 |
| 33 | -2132 |
| 34 | 2415 |
| 35 | -2550 |
| 36 | 2353 |
| 37 | -2850 |
| 38 | 3120 |
| 39 | -2810 |
| 40 | 3321 |
| 41 | -3486 |
| 42 | 3285 |
| 43 | -3906 |
| 44 | 4005 |