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 | 1 |
| 2 | 456 |
| 3 | 14976 |
| 4 | 181780 |
| 5 | 1273970 |
| 6 | 6293756 |
| 7 | 24395756 |
| 8 | 79119496 |
| 9 | 223821235 |
| 10 | 568280240 |
| 11 | 1321714636 |
| 12 | 2858876956 |
| 13 | 5817509516 |
| 14 | 11237224740 |
| 15 | 20751835560 |
| 16 | 36849296016 |
| 17 | 63215722181 |
| 18 | 105182448536 |
| 19 | 170297734920 |
| 20 | 269047574180 |
| 21 | 415753060646 |
| 22 | 629674964556 |
| 23 | 936359517556 |