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 | 1 |
| 5 | 3 |
| 6 | 4 |
| 7 | 7 |
| 8 | 9 |
| 9 | 16 |
| 10 | 22 |
| 11 | 46 |
| 12 | 63 |
| 13 | 121 |
| 14 | 167 |
| 15 | 455 |
| 16 | 912 |
| 17 | 1263 |
| 18 | 2535 |
| 19 | 3514 |
| 20 | 7099 |
| 21 | 9873 |
| 22 | 20043 |
| 23 | 27956 |
| 24 | 56807 |
| 25 | 79397 |
| 26 | 161736 |
| 27 | 226559 |
| 28 | 462482 |
| 29 | 649100 |
| 30 | 1327165 |
| 31 | 1865833 |
| 32 | 3820605 |
| 33 | 5379507 |
| 34 | 11028753 |
| 35 | 15550459 |
| 36 | 31913892 |
| 37 | 45057416 |
| 38 | 92557088 |
| 39 | 130837407 |
| 40 | 268988726 |