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 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 3 |
| 9 | 11 |
| 10 | 34 |
| 11 | 99 |
| 12 | 279 |
| 13 | 773 |
| 14 | 2103 |
| 15 | 5661 |
| 16 | 15160 |
| 17 | 40373 |
| 18 | 107355 |
| 19 | 285059 |
| 20 | 757273 |
| 21 | 2013177 |
| 22 | 5361100 |
| 23 | 14303274 |
| 24 | 38250297 |
| 25 | 102538714 |
| 26 | 275597098 |
| 27 | 742674804 |
| 28 | 2006661720 |
| 29 | 5436008057 |
| 30 | 14763754746 |
| 31 | 40196603110 |
| 32 | 109703958381 |
| 33 | 300091975184 |
| 34 | 822705857129 |