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 | 7 |
| 2 | 34 |
| 3 | 115 |
| 4 | 298 |
| 5 | 677 |
| 6 | 1431 |
| 7 | 2853 |
| 8 | 5401 |
| 9 | 9813 |
| 10 | 17289 |
| 11 | 29687 |
| 12 | 49901 |
| 13 | 82315 |
| 14 | 133617 |
| 15 | 213801 |
| 16 | 337742 |
| 17 | 527231 |
| 18 | 814218 |
| 19 | 1244962 |
| 20 | 1886069 |
| 21 | 2833392 |
| 22 | 4223121 |
| 23 | 6247850 |
| 24 | 9179762 |
| 25 | 13399951 |
| 26 | 19440903 |
| 27 | 28043882 |
| 28 | 40233399 |
| 29 | 57423953 |
| 30 | 81557903 |