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 | 6 |
| 2 | 63 |
| 3 | 364 |
| 4 | 1365 |
| 5 | 3906 |
| 6 | 9331 |
| 7 | 19608 |
| 8 | 37449 |
| 9 | 66430 |
| 10 | 111111 |
| 11 | 177156 |
| 12 | 271453 |
| 13 | 402234 |
| 14 | 579195 |
| 15 | 813616 |
| 16 | 1118481 |
| 17 | 1508598 |
| 18 | 2000719 |
| 19 | 2613660 |
| 20 | 3368421 |
| 21 | 4288306 |
| 22 | 5399043 |
| 23 | 6728904 |
| 24 | 8308825 |
| 25 | 10172526 |
| 26 | 12356631 |
| 27 | 14900788 |
| 28 | 17847789 |
| 29 | 21243690 |
| 30 | 25137931 |