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 | -8 |
| 3 | -18 |
| 4 | 12 |
| 5 | -40 |
| 6 | 144 |
| 7 | -84 |
| 8 | 0 |
| 9 | 45 |
| 10 | 320 |
| 11 | -154 |
| 12 | -216 |
| 13 | -234 |
| 14 | 672 |
| 15 | 720 |
| 16 | 0 |
| 17 | -340 |
| 18 | -360 |
| 19 | -456 |
| 20 | -480 |
| 21 | 1512 |
| 22 | 1232 |
| 23 | -690 |
| 24 | 0 |
| 25 | 175 |
| 26 | 1872 |
| 27 | 0 |
| 28 | -1008 |
| 29 | -928 |
| 30 | -5760 |
| 31 | -1178 |
| 32 | 0 |
| 33 | 2772 |
| 34 | 2720 |
| 35 | 3360 |
| 36 | 540 |
| 37 | -1554 |
| 38 | 3648 |
| 39 | 4212 |
| 40 | 0 |
| 41 | -1804 |
| 42 | -12096 |
| 43 | -2064 |
| 44 | -1848 |
| 45 | -1800 |
| 46 | 5520 |
| 47 | -2538 |
| 48 | 0 |
| 49 | 539 |
| 50 | -1400 |
| 51 | 6120 |
| 52 | -2808 |
| 53 | -3180 |
| 54 | 0 |
| 55 | 6160 |
| 56 | 0 |
| 57 | 8208 |
| 58 | 7424 |