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 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 7 |
| 7 | 10 |
| 8 | 18 |
| 9 | 30 |
| 10 | 54 |
| 11 | 94 |
| 12 | 176 |
| 13 | 316 |
| 14 | 591 |
| 15 | 1096 |
| 16 | 2058 |
| 17 | 3856 |
| 18 | 7301 |
| 19 | 13798 |
| 20 | 26244 |
| 21 | 49940 |
| 22 | 95373 |
| 23 | 182362 |
| 24 | 349626 |
| 25 | 671092 |
| 26 | 1290714 |
| 27 | 2485534 |
| 28 | 4793790 |
| 29 | 9256396 |
| 30 | 17896284 |
| 31 | 34636834 |
| 32 | 67109898 |
| 33 | 130150588 |
| 34 | 252647064 |
| 35 | 490853416 |
| 36 | 954440950 |