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 | 1 |
| 5 | 3 |
| 6 | 2 |
| 7 | 10 |
| 8 | 8 |
| 9 | 32 |
| 10 | 18 |
| 11 | 75 |
| 12 | 51 |
| 13 | 292 |
| 14 | 140 |
| 15 | 518 |
| 16 | 534 |
| 17 | 2167 |
| 18 | 1292 |
| 19 | 6055 |
| 20 | 4318 |
| 21 | 23899 |
| 22 | 16589 |
| 23 | 53108 |
| 24 | 46683 |
| 25 | 312340 |
| 26 | 159483 |
| 27 | 567857 |
| 28 | 639256 |
| 29 | 2810965 |
| 30 | 1826974 |