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 | 1 |
| 1 | 14 |
| 2 | 63 |
| 3 | 364 |
| 4 | 2429 |
| 5 | 16842 |
| 6 | 117691 |
| 7 | 823592 |
| 8 | 5764857 |
| 9 | 40353670 |
| 10 | 282475319 |
| 11 | 1977326820 |
| 12 | 13841287285 |
| 13 | 96889010498 |
| 14 | 678223072947 |
| 15 | 4747561510048 |
| 16 | 33232930569713 |
| 17 | 232630513987326 |
| 18 | 1628413597910575 |
| 19 | 11398895185373276 |
| 20 | 79792266297612141 |
| 21 | 558545864083284154 |
| 22 | 3909821048582988203 |