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 | 4 |
| 5 | 4 |
| 6 | 2 |
| 7 | -3 |
| 8 | -10 |
| 9 | -14 |
| 10 | -4 |
| 11 | 34 |
| 12 | 104 |
| 13 | 172 |
| 14 | 132 |
| 15 | -197 |
| 16 | -964 |
| 17 | -1976 |
| 18 | -2190 |
| 19 | 652 |
| 20 | 9294 |
| 21 | 23626 |
| 22 | 33762 |
| 23 | 12140 |
| 24 | -84438 |
| 25 | -280850 |
| 26 | -493930 |
| 27 | -397666 |
| 28 | 639678 |
| 29 | 3248466 |
| 30 | 6947462 |
| 31 | 8068589 |
| 32 | -2165978 |
| 33 | -35591958 |
| 34 | -94129444 |
| 35 | -139864826 |
| 36 | -56393480 |
| 37 | 352505724 |