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 | 3 |
| 2 | 14 |
| 3 | 47 |
| 4 | 164 |
| 5 | 577 |
| 6 | 2046 |
| 7 | 7275 |
| 8 | 25896 |
| 9 | 92213 |
| 10 | 328402 |
| 11 | 1169599 |
| 12 | 4165564 |
| 13 | 14835849 |
| 14 | 52838630 |
| 15 | 188187539 |
| 16 | 670239824 |
| 17 | 2387094493 |
| 18 | 8501763066 |
| 19 | 30279478119 |
| 20 | 107841960420 |
| 21 | 384084837425 |
| 22 | 1367938433038 |
| 23 | 4871984973883 |
| 24 | 17351831787640 |
| 25 | 61799465310597 |
| 26 | 220102059506978 |