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 | 1 |
| 6 | 4 |
| 7 | 8 |
| 8 | 24 |
| 9 | 55 |
| 10 | 147 |
| 11 | 365 |
| 12 | 954 |
| 13 | 2431 |
| 14 | 6327 |
| 15 | 16369 |
| 16 | 42743 |
| 17 | 111595 |
| 18 | 292849 |
| 19 | 769805 |
| 20 | 2030456 |
| 21 | 5366844 |
| 22 | 14222475 |
| 23 | 37768154 |
| 24 | 100510364 |
| 25 | 267987501 |
| 26 | 715847932 |
| 27 | 1915406263 |
| 28 | 5133382014 |
| 29 | 13778469949 |
| 30 | 37035674682 |
| 31 | 99683747508 |
| 32 | 268647638770 |
| 33 | 724879674667 |
| 34 | 1958151665752 |