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 | 1 |
| 2 | 3 |
| 3 | 3 |
| 4 | 3 |
| 5 | 7 |
| 6 | -3 |
| 7 | 13 |
| 8 | -5 |
| 9 | -7 |
| 10 | 49 |
| 11 | -97 |
| 12 | 93 |
| 13 | 155 |
| 14 | -997 |
| 15 | 2893 |
| 16 | -5989 |
| 17 | 9007 |
| 18 | -7121 |
| 19 | -10805 |
| 20 | 63305 |
| 21 | -169375 |
| 22 | 321137 |
| 23 | -418503 |
| 24 | 152653 |
| 25 | 1142657 |
| 26 | -4565939 |
| 27 | 11378145 |
| 28 | -21893565 |
| 29 | 32887315 |
| 30 | -33140953 |
| 31 | -1985517 |
| 32 | 113177979 |
| 33 | -348817177 |
| 34 | 734074637 |
| 35 | -1210600023 |