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 | 2430 |
| 2 | 11880 |
| 3 | 44550 |
| 4 | 138996 |
| 5 | 378378 |
| 6 | 926640 |
| 7 | 2084940 |
| 8 | 4375800 |
| 9 | 8664084 |
| 10 | 16325712 |
| 11 | 29476980 |
| 12 | 51279480 |
| 13 | 86337900 |
| 14 | 141210432 |
| 15 | 225054126 |
| 16 | 350430300 |
| 17 | 534298050 |
| 18 | 799227000 |
| 19 | 1174863690 |
| 20 | 1699689420 |
| 21 | 2423110950 |
| 22 | 3407929200 |
| 23 | 4733235000 |