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 | 11 |
| 2 | 32 |
| 3 | 76 |
| 4 | 168 |
| 5 | 360 |
| 6 | 760 |
| 7 | 1592 |
| 8 | 3320 |
| 9 | 6904 |
| 10 | 14328 |
| 11 | 29688 |
| 12 | 61432 |
| 13 | 126968 |
| 14 | 262136 |
| 15 | 540664 |
| 16 | 1114104 |
| 17 | 2293752 |
| 18 | 4718584 |
| 19 | 9699320 |
| 20 | 19922936 |
| 21 | 40894456 |
| 22 | 83886072 |
| 23 | 171966456 |
| 24 | 352321528 |
| 25 | 721420280 |
| 26 | 1476395000 |
| 27 | 3019898872 |
| 28 | 6174015480 |
| 29 | 12616466424 |
| 30 | 25769803768 |