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 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 7 |
| 7 | 13 |
| 8 | 24 |
| 9 | 45 |
| 10 | 84 |
| 11 | 157 |
| 12 | 293 |
| 13 | 547 |
| 14 | 1021 |
| 15 | 1906 |
| 16 | 3558 |
| 17 | 6642 |
| 18 | 12399 |
| 19 | 23146 |
| 20 | 43208 |
| 21 | 80659 |
| 22 | 150571 |
| 23 | 281080 |
| 24 | 524709 |
| 25 | 979506 |
| 26 | 1828503 |
| 27 | 3413377 |
| 28 | 6371957 |
| 29 | 11894917 |
| 30 | 22204960 |
| 31 | 41451340 |
| 32 | 77379720 |
| 33 | 144449397 |
| 34 | 269652414 |