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 | 0 |
| 1 | 6 |
| 2 | 198 |
| 3 | 2076 |
| 4 | 12060 |
| 5 | 49170 |
| 6 | 158418 |
| 7 | 431544 |
| 8 | 1036728 |
| 9 | 2258910 |
| 10 | 4552350 |
| 11 | 8607060 |
| 12 | 15430740 |
| 13 | 26447850 |
| 14 | 43617450 |
| 15 | 69571440 |
| 16 | 107774832 |
| 17 | 162709686 |
| 18 | 240084342 |
| 19 | 347069580 |
| 20 | 492563340 |
| 21 | 687485634 |
| 22 | 945105282 |
| 23 | 1281400104 |
| 24 | 1715452200 |
| 25 | 2269879950 |
| 26 | 2971308366 |