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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 14 |
| 6 | 26 |
| 7 | 50 |
| 8 | 95 |
| 9 | 180 |
| 10 | 343 |
| 11 | 652 |
| 12 | 1240 |
| 13 | 2359 |
| 14 | 4486 |
| 15 | 8532 |
| 16 | 16227 |
| 17 | 30862 |
| 18 | 58697 |
| 19 | 111636 |
| 20 | 212321 |
| 21 | 403814 |
| 22 | 768015 |
| 23 | 1460691 |
| 24 | 2778094 |
| 25 | 5283667 |
| 26 | 10049027 |
| 27 | 19112282 |
| 28 | 36349721 |
| 29 | 69133673 |
| 30 | 131485594 |
| 31 | 250072951 |
| 32 | 475614693 |
| 33 | 904573387 |
| 34 | 1720411555 |
| 35 | 3272057256 |
| 36 | 6223138101 |
| 37 | 11835809946 |
| 38 | 22510571803 |
| 39 | 42812941849 |