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 | -5 |
| 2 | 13 |
| 3 | -25 |
| 4 | 40 |
| 5 | -56 |
| 6 | 70 |
| 7 | -78 |
| 8 | 75 |
| 9 | -55 |
| 10 | 11 |
| 11 | 65 |
| 12 | -182 |
| 13 | 350 |
| 14 | -580 |
| 15 | 884 |
| 16 | -1275 |
| 17 | 1767 |
| 18 | -2375 |
| 19 | 3115 |
| 20 | -4004 |
| 21 | 5060 |
| 22 | -6302 |
| 23 | 7750 |
| 24 | -9425 |
| 25 | 11349 |
| 26 | -13545 |
| 27 | 16037 |
| 28 | -18850 |
| 29 | 22010 |
| 30 | -25544 |
| 31 | 29480 |
| 32 | -33847 |
| 33 | 38675 |
| 34 | -43995 |
| 35 | 49839 |
| 36 | -56240 |
| 37 | 63232 |
| 38 | -70850 |
| 39 | 79130 |
| 40 | -88109 |
| 41 | 97825 |
| 42 | -108317 |
| 43 | 119625 |
| 44 | -131790 |