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 | 0 |
| 1 | 5 |
| 2 | 110 |
| 3 | 675 |
| 4 | 2540 |
| 5 | 7145 |
| 6 | 16650 |
| 7 | 34055 |
| 8 | 63320 |
| 9 | 109485 |
| 10 | 178790 |
| 11 | 278795 |
| 12 | 418500 |
| 13 | 608465 |
| 14 | 860930 |
| 15 | 1189935 |
| 16 | 1611440 |
| 17 | 2143445 |
| 18 | 2806110 |
| 19 | 3621875 |
| 20 | 4615580 |
| 21 | 5814585 |
| 22 | 7248890 |
| 23 | 8951255 |
| 24 | 10957320 |
| 25 | 13305725 |
| 26 | 16038230 |
| 27 | 19199835 |
| 28 | 22838900 |
| 29 | 27007265 |
| 30 | 31760370 |