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 | 108 |
| 2 | 2304 |
| 3 | 3888 |
| 4 | 9216 |
| 5 | 24192 |
| 6 | 57600 |
| 7 | 137088 |
| 8 | 331776 |
| 9 | 802944 |
| 10 | 1937664 |
| 11 | 4675968 |
| 12 | 11289600 |
| 13 | 27257472 |
| 14 | 65804544 |
| 15 | 158864256 |
| 16 | 383533056 |
| 17 | 925932672 |
| 18 | 2235398400 |
| 19 | 5396727168 |
| 20 | 13028852736 |
| 21 | 31454434944 |
| 22 | 75937722624 |
| 23 | 183329877888 |