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) |
|---|---|
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 3 |
| 7 | 7 |
| 8 | 12 |
| 9 | 39 |
| 10 | 105 |
| 11 | 231 |
| 12 | 577 |
| 13 | 1482 |
| 14 | 3549 |
| 15 | 8603 |
| 16 | 21340 |
| 17 | 52122 |
| 18 | 126777 |
| 19 | 310859 |
| 20 | 761199 |
| 21 | 1859014 |
| 22 | 4549215 |
| 23 | 11141085 |
| 24 | 27266225 |
| 25 | 66760855 |
| 26 | 163567911 |
| 27 | 400786617 |
| 28 | 982265827 |
| 29 | 2408361144 |
| 30 | 5906499136 |
| 31 | 14489105190 |
| 32 | 35553445788 |
| 33 | 87264949808 |
| 34 | 214241203801 |