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 | 2 |
| 4 | 5 |
| 5 | -2 |
| 6 | 3 |
| 7 | -20 |
| 8 | -2 |
| 9 | -38 |
| 10 | 75 |
| 11 | 84 |
| 12 | 612 |
| 13 | 596 |
| 14 | 2293 |
| 15 | 534 |
| 16 | 4722 |
| 17 | -6354 |
| 18 | 6716 |
| 19 | -27696 |
| 20 | 44962 |
| 21 | -8232 |
| 22 | 391279 |
| 23 | 310072 |
| 24 | 1975046 |
| 25 | 906028 |
| 26 | 6363470 |
| 27 | -2135522 |
| 28 | 15639296 |
| 29 | -21729494 |
| 30 | 57269753 |
| 31 | -46268934 |
| 32 | 370270484 |
| 33 | 130699742 |
| 34 | 2081100420 |
| 35 | 915348168 |
| 36 | 8523787094 |