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) |
|---|---|
| 4 | 1 |
| 5 | 2 |
| 6 | 7 |
| 7 | 15 |
| 8 | 44 |
| 9 | 107 |
| 10 | 295 |
| 11 | 763 |
| 12 | 2077 |
| 13 | 5533 |
| 14 | 15053 |
| 15 | 40697 |
| 16 | 111028 |
| 17 | 302583 |
| 18 | 828176 |
| 19 | 2267939 |
| 20 | 6225340 |
| 21 | 17103834 |
| 22 | 47062513 |
| 23 | 129616014 |
| 24 | 357364708 |
| 25 | 986110340 |
| 26 | 2723373330 |
| 27 | 7526669582 |
| 28 | 20816208417 |
| 29 | 57606623093 |
| 30 | 159514679011 |
| 31 | 441942381946 |
| 32 | 1225049208597 |
| 33 | 3397418545998 |