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 | 128 |
| 2 | 3280 |
| 3 | 32768 |
| 4 | 195312 |
| 5 | 839808 |
| 6 | 2882400 |
| 7 | 8388608 |
| 8 | 21523360 |
| 9 | 50000000 |
| 10 | 107179440 |
| 11 | 214990848 |
| 12 | 407865360 |
| 13 | 737894528 |
| 14 | 1281445312 |
| 15 | 2147483648 |
| 16 | 3487878720 |
| 17 | 5509980288 |
| 18 | 8491781520 |
| 19 | 12800000000 |
| 20 | 18911429680 |
| 21 | 27437936768 |
| 22 | 39155492640 |
| 23 | 55037657088 |
| 24 | 76293945312 |
| 25 | 104413532288 |