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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | -1 |
| 8 | -2 |
| 9 | -3 |
| 10 | -2 |
| 11 | 4 |
| 12 | -1 |
| 13 | 5 |
| 14 | 3 |
| 15 | -4 |
| 16 | -5 |
| 17 | -9 |
| 18 | 3 |
| 19 | -3 |
| 20 | 15 |
| 21 | 19 |
| 22 | 0 |
| 23 | 6 |
| 24 | -39 |
| 25 | -27 |
| 26 | -22 |
| 27 | 5 |
| 28 | 57 |
| 29 | 50 |
| 30 | 107 |
| 31 | -49 |
| 32 | -96 |
| 33 | -142 |
| 34 | -213 |
| 35 | 83 |
| 36 | 138 |
| 37 | 468 |
| 38 | 365 |
| 39 | 0 |
| 40 | -327 |
| 41 | -1215 |
| 42 | -618 |
| 43 | -526 |
| 44 | 957 |
| 45 | 2572 |
| 46 | 1831 |
| 47 | 1673 |
| 48 | -2820 |
| 49 | -4516 |
| 50 | -6155 |
| 51 | -3880 |
| 52 | 5998 |
| 53 | 9282 |
| 54 | 18213 |
| 55 | 7414 |