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 | 4 |
| 2 | 11 |
| 3 | 30 |
| 4 | 77 |
| 5 | 200 |
| 6 | 511 |
| 7 | 1314 |
| 8 | 3361 |
| 9 | 8620 |
| 10 | 22067 |
| 11 | 56550 |
| 12 | 144821 |
| 13 | 371024 |
| 14 | 950311 |
| 15 | 2434410 |
| 16 | 6235657 |
| 17 | 15973300 |
| 18 | 40915931 |
| 19 | 104809134 |
| 20 | 268472861 |
| 21 | 687709400 |
| 22 | 1761600847 |
| 23 | 4512438450 |
| 24 | 11558841841 |
| 25 | 29608595644 |
| 26 | 75843963011 |