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 | -4 |
| 3 | -7 |
| 4 | -21 |
| 5 | -19 |
| 6 | 30 |
| 7 | -11 |
| 8 | 51 |
| 9 | -132 |
| 10 | -164 |
| 11 | -91 |
| 12 | -11 |
| 13 | -51 |
| 14 | -588 |
| 15 | -935 |
| 16 | -5904 |
| 17 | -451 |
| 18 | -1402 |
| 19 | -251 |
| 20 | -5979 |
| 21 | -7347 |
| 22 | -13898 |
| 23 | -2251 |
| 24 | -25507 |
| 25 | -12140 |
| 26 | -27718 |
| 27 | -99060 |
| 28 | -174307 |
| 29 | -11251 |
| 30 | 11610 |
| 31 | -15 |
| 32 | 52653 |
| 33 | 685 |
| 34 | 2410 |
| 35 | -1095 |
| 36 | 24800 |
| 37 | -71 |
| 38 | -198 |
| 39 | -2647 |
| 40 | 53673 |
| 41 | -631 |
| 42 | 61020 |
| 43 | -351 |
| 44 | 94173 |
| 45 | -20052 |
| 46 | -21368 |
| 47 | -3151 |
| 48 | 207838 |