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 | 2 |
| 2 | 3 |
| 3 | 2 |
| 4 | -3 |
| 5 | -14 |
| 6 | -29 |
| 7 | -38 |
| 8 | -19 |
| 9 | 58 |
| 10 | 211 |
| 11 | 402 |
| 12 | 477 |
| 13 | 130 |
| 14 | -1021 |
| 15 | -3126 |
| 16 | -5491 |
| 17 | -5814 |
| 18 | 115 |
| 19 | 17026 |
| 20 | 45565 |
| 21 | 73874 |
| 22 | 68131 |
| 23 | -28742 |
| 24 | -273363 |
| 25 | -654246 |
| 26 | -977645 |
| 27 | -754318 |
| 28 | 777501 |
| 29 | 4264610 |
| 30 | 9260355 |
| 31 | 12701098 |
| 32 | 7612621 |
| 33 | -15996566 |
| 34 | -65007949 |
| 35 | -129244574 |
| 36 | -161488067 |
| 37 | -63715662 |
| 38 | 292545891 |