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 | 28 |
| 2 | 992 |
| 3 | 16256 |
| 4 | 523264 |
| 5 | 69524373504 |
| 6 | 67100672 |
| 7 | 7767211311104 |
| 8 | 3014494287036416 |
| 9 | 2303837503821447168 |
| 10 | 341653284209033216 |
| 11 | 798366828940770681028608 |
| 12 | 11852230872517975212032 |
| 13 | 91678339751618435453288448 |
| 14 | 1986677733776616536315084668928 |
| 15 | 284423744326342962334231917756416 |