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 | 2 |
| 3 | 3 |
| 4 | 3 |
| 5 | 1 |
| 6 | -2 |
| 7 | -1 |
| 8 | 10 |
| 9 | 25 |
| 10 | 12 |
| 11 | -65 |
| 12 | -151 |
| 13 | -7 |
| 14 | 588 |
| 15 | 1083 |
| 16 | -437 |
| 17 | -5247 |
| 18 | -7732 |
| 19 | 7943 |
| 20 | 47503 |
| 21 | 53793 |
| 22 | -105312 |
| 23 | -430117 |
| 24 | -343042 |
| 25 | 1249801 |
| 26 | 3866558 |
| 27 | 1730019 |
| 28 | -13996095 |
| 29 | -34243895 |
| 30 | -1947202 |
| 31 | 150962375 |
| 32 | 296101866 |
| 33 | -121857183 |
| 34 | -1582561868 |
| 35 | -2468098041 |
| 36 | 2529520767 |