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 | 5 |
| 4 | 3 |
| 5 | 14 |
| 6 | 23 |
| 7 | 15 |
| 8 | 81 |
| 9 | 73 |
| 10 | 167 |
| 11 | 105 |
| 12 | 660 |
| 13 | 414 |
| 14 | 804 |
| 15 | 1473 |
| 16 | 945 |
| 17 | 6825 |
| 18 | 2850 |
| 19 | 7578 |
| 20 | 7629 |
| 21 | 16413 |
| 22 | 10395 |
| 23 | 85050 |
| 24 | 19425 |
| 25 | 99420 |
| 26 | 61389 |
| 27 | 111882 |
| 28 | 211479 |
| 29 | 135135 |
| 30 | 1237005 |
| 31 | 59535 |
| 32 | 1642725 |
| 33 | 429525 |
| 34 | 1461375 |
| 35 | 1518525 |
| 36 | 3192975 |
| 37 | 2027025 |
| 38 | 20540520 |
| 39 | -2619540 |