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 | 1 |
| 6 | 5 |
| 7 | 5 |
| 8 | 21 |
| 9 | 26 |
| 10 | 93 |
| 11 | 116 |
| 12 | 392 |
| 13 | 497 |
| 14 | 1616 |
| 15 | 2087 |
| 16 | 6690 |
| 17 | 8656 |
| 18 | 27493 |
| 19 | 35797 |
| 20 | 113728 |
| 21 | 147838 |
| 22 | 469824 |
| 23 | 611551 |
| 24 | 1951237 |