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 | 8 |
| 2 | 25 |
| 3 | 78 |
| 4 | 245 |
| 5 | 775 |
| 6 | 2450 |
| 7 | 7746 |
| 8 | 24495 |
| 9 | 77460 |
| 10 | 244949 |
| 11 | 774597 |
| 12 | 2449490 |
| 13 | 7745967 |
| 14 | 24494898 |
| 15 | 77459667 |
| 16 | 244948975 |
| 17 | 774596670 |
| 18 | 2449489743 |
| 19 | 7745966693 |
| 20 | 24494897428 |
| 21 | 77459666925 |
| 22 | 244948974279 |
| 23 | 774596669242 |
| 24 | 2449489742784 |
| 25 | 7745966692415 |
| 26 | 24494897427832 |
| 27 | 77459666924149 |