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 | 8 |
| 2 | 36 |
| 3 | 164 |
| 4 | 760 |
| 5 | 3504 |
| 6 | 16224 |
| 7 | 75114 |
| 8 | 347794 |
| 9 | 1610482 |
| 10 | 7457403 |
| 11 | 34531926 |
| 12 | 159901992 |
| 13 | 740434409 |
| 14 | 3428619670 |
| 15 | 15876397382 |
| 16 | 73516462261 |
| 17 | 340421698733 |
| 18 | 1576339895161 |
| 19 | 7299321618669 |
| 20 | 33799877958800 |
| 21 | 156512044508653 |
| 22 | 724736938606683 |