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 | 0 |
| 1 | -1 |
| 2 | 10 |
| 3 | -28 |
| 4 | 62 |
| 5 | -113 |
| 6 | 188 |
| 7 | -288 |
| 8 | 420 |
| 9 | -585 |
| 10 | 790 |
| 11 | -1036 |
| 12 | 1330 |
| 13 | -1673 |
| 14 | 2072 |
| 15 | -2528 |
| 16 | 3048 |
| 17 | -3633 |
| 18 | 4290 |
| 19 | -5020 |
| 20 | 5830 |
| 21 | -6721 |
| 22 | 7700 |
| 23 | -8768 |
| 24 | 9932 |
| 25 | -11193 |
| 26 | 12558 |
| 27 | -14028 |
| 28 | 15610 |
| 29 | -17305 |
| 30 | 19120 |
| 31 | -21056 |
| 32 | 23120 |
| 33 | -25313 |
| 34 | 27642 |
| 35 | -30108 |
| 36 | 32718 |
| 37 | -35473 |
| 38 | 38380 |
| 39 | -41440 |
| 40 | 44660 |