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 | 28 |
| 1 | 588 |
| 2 | 5880 |
| 3 | 38808 |
| 4 | 194040 |
| 5 | 792792 |
| 6 | 2774772 |
| 7 | 8588580 |
| 8 | 24048024 |
| 9 | 61941880 |
| 10 | 148660512 |
| 11 | 335785632 |
| 12 | 719540640 |
| 13 | 1472290848 |
| 14 | 2891999880 |
| 15 | 5477788008 |
| 16 | 10042611348 |
| 17 | 17877713700 |
| 18 | 30988037080 |
| 19 | 52423371000 |
| 20 | 86736850200 |
| 21 | 140610670200 |
| 22 | 223698793500 |
| 23 | 349748200620 |
| 24 | 538074154800 |