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 | 2 |
| 2 | 66 |
| 3 | 732 |
| 4 | 4100 |
| 5 | 15630 |
| 6 | 46662 |
| 7 | 117656 |
| 8 | 262152 |
| 9 | 531450 |
| 10 | 1000010 |
| 11 | 1771572 |
| 12 | 2985996 |
| 13 | 4826822 |
| 14 | 7529550 |
| 15 | 11390640 |
| 16 | 16777232 |
| 17 | 24137586 |
| 18 | 34012242 |
| 19 | 47045900 |
| 20 | 64000020 |
| 21 | 85766142 |
| 22 | 113379926 |
| 23 | 148035912 |
| 24 | 191103000 |
| 25 | 244140650 |
| 26 | 308915802 |