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 | 10 |
| 2 | 40 |
| 3 | 185 |
| 4 | 765 |
| 5 | 2845 |
| 6 | 10220 |
| 7 | 33885 |
| 8 | 105185 |
| 9 | 305465 |
| 10 | 830811 |
| 11 | 2119875 |
| 12 | 5091525 |
| 13 | 11565505 |
| 14 | 24977315 |
| 15 | 51552005 |
| 16 | 102175360 |
| 17 | 195301015 |
| 18 | 361365695 |
| 19 | 649360880 |
| 20 | 1136438375 |
| 21 | 1941722170 |
| 22 | 3245874555 |
| 23 | 5318438260 |
| 24 | 8555568895 |
| 25 | 13531506921 |