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 | 0 |
| 2 | 438 |
| 3 | 1536 |
| 4 | 9372 |
| 5 | 15360 |
| 6 | 57896 |
| 7 | 70656 |
| 8 | 211638 |
| 9 | 215040 |
| 10 | 582648 |
| 11 | 529920 |
| 12 | 1316472 |
| 13 | 1139712 |
| 14 | 2619264 |
| 15 | 2159616 |
| 16 | 4815516 |
| 17 | 3766272 |
| 18 | 8165550 |
| 19 | 6259200 |
| 20 | 13070328 |
| 21 | 9799680 |
| 22 | 20203512 |
| 23 | 14693376 |
| 24 | 29739560 |
| 25 | 21553152 |
| 26 | 42530424 |
| 27 | 30369792 |
| 28 | 59881584 |
| 29 | 41671680 |
| 30 | 81197184 |