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 | 3 |
| 1 | 8 |
| 2 | 38 |
| 3 | 256 |
| 4 | 1298 |
| 5 | 9792 |
| 6 | 52136 |
| 7 | 338580 |
| 8 | 1778436 |
| 9 | 11889152 |
| 10 | 62367272 |
| 11 | 414625216 |
| 12 | 2178461956 |
| 13 | 15224775552 |
| 14 | 80673299432 |
| 15 | 611106029568 |
| 16 | 2830769440776 |
| 17 | 19344856702976 |
| 18 | 115255634181184 |
| 19 | 696800841097536 |
| 20 | 3748220725527432 |
| 21 | 27388329197137920 |
| 22 | 135183433256806480 |