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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 2 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 4 |
| 18 | 6 |
| 19 | 18 |
| 20 | 14 |
| 21 | 26 |
| 22 | 84 |
| 23 | 88 |
| 24 | 46 |
| 25 | 176 |
| 26 | 380 |
| 27 | 812 |
| 28 | 844 |
| 29 | 1770 |
| 30 | 2164 |
| 31 | 5554 |
| 32 | 9244 |
| 33 | 25384 |
| 34 | 62092 |
| 35 | 68176 |
| 36 | 85762 |
| 37 | 304892 |
| 38 | 855072 |
| 39 | 1229050 |
| 40 | 1805096 |