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 | 2 |
| 6 | 8 |
| 7 | 14 |
| 8 | 43 |
| 9 | 72 |
| 10 | 204 |
| 11 | 336 |
| 12 | 926 |
| 13 | 1516 |
| 14 | 4144 |
| 15 | 6772 |
| 16 | 18504 |
| 17 | 30236 |
| 18 | 82844 |
| 19 | 135452 |
| 20 | 372581 |
| 21 | 609710 |
| 22 | 1684220 |
| 23 | 2758730 |
| 24 | 7652531 |
| 25 | 12546332 |
| 26 | 34941752 |
| 27 | 57337172 |
| 28 | 160280987 |
| 29 | 263224802 |
| 30 | 738363872 |
| 31 | 1213502942 |
| 32 | 3414804517 |