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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 5 |
| 6 | 13 |
| 7 | 29 |
| 8 | 71 |
| 9 | 165 |
| 10 | 421 |
| 11 | 1029 |
| 12 | 2647 |
| 13 | 6593 |
| 14 | 17241 |
| 15 | 43801 |
| 16 | 115555 |
| 17 | 297513 |
| 18 | 791337 |
| 19 | 2062737 |
| 20 | 5516755 |
| 21 | 14497373 |
| 22 | 38994597 |
| 23 | 103269053 |
| 24 | 278921927 |
| 25 | 742950845 |
| 26 | 2014648253 |
| 27 | 5396210357 |
| 28 | 14677306503 |
| 29 | 39477832745 |
| 30 | 107701409665 |
| 31 | 290871580345 |
| 32 | 795431700707 |
| 33 | 2155140605137 |