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) |
|---|---|
| 1 | 243 |
| 2 | 1458 |
| 3 | 5103 |
| 4 | 13608 |
| 5 | 30618 |
| 6 | 61236 |
| 7 | 112266 |
| 8 | 192456 |
| 9 | 312741 |
| 10 | 486486 |
| 11 | 729729 |
| 12 | 1061424 |
| 13 | 1503684 |
| 14 | 2082024 |
| 15 | 2825604 |
| 16 | 3767472 |
| 17 | 4944807 |
| 18 | 6399162 |
| 19 | 8176707 |
| 20 | 10328472 |
| 21 | 12910590 |
| 22 | 15984540 |
| 23 | 19617390 |
| 24 | 23882040 |
| 25 | 28857465 |
| 26 | 34628958 |
| 27 | 41288373 |
| 28 | 48934368 |
| 29 | 57672648 |
| 30 | 67616208 |