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 | 1 |
| 4 | 0 |
| 5 | 3 |
| 6 | 1 |
| 7 | 3 |
| 8 | 9 |
| 9 | 31 |
| 10 | 34 |
| 11 | 37 |
| 12 | 81 |
| 13 | 137 |
| 14 | 347 |
| 15 | 487 |
| 16 | 690 |
| 17 | 355 |
| 18 | 1369 |
| 19 | 2001 |
| 20 | 1926 |
| 21 | 5331 |
| 22 | 1369 |
| 23 | 4823 |
| 24 | 8289 |
| 25 | 74043 |
| 26 | 77951 |
| 27 | 188571 |
| 28 | 284781 |
| 29 | 490766 |
| 30 | 166409 |
| 31 | 1333373 |
| 32 | 1803615 |
| 33 | 1516839 |
| 34 | 914943 |
| 35 | 3619092 |
| 36 | 3987873 |
| 37 | 17604245 |
| 38 | 8506938 |
| 39 | 57277423 |
| 40 | 24741861 |