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 | 1 |
| 2 | 258 |
| 3 | 7076 |
| 4 | 79430 |
| 5 | 542409 |
| 6 | 2685004 |
| 7 | 10592400 |
| 8 | 35277012 |
| 9 | 103008345 |
| 10 | 270739678 |
| 11 | 652829892 |
| 12 | 1464901802 |
| 13 | 3092704433 |
| 14 | 6196296120 |
| 15 | 11862778432 |
| 16 | 21824228040 |
| 17 | 38761435089 |
| 18 | 66718602714 |
| 19 | 111659333380 |
| 20 | 182200064046 |
| 21 | 290563654073 |
| 22 | 453803117636 |
| 23 | 695353566480 |
| 24 | 1046979329500 |