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 | 68 |
| 2 | 2278 |
| 3 | 50116 |
| 4 | 814385 |
| 5 | 10424128 |
| 6 | 109453344 |
| 7 | 969443904 |
| 8 | 7392009768 |
| 9 | 49280065120 |
| 10 | 290752384208 |
| 11 | 1533058025824 |
| 12 | 7282025622664 |
| 13 | 31368725759168 |
| 14 | 123234279768160 |
| 15 | 443643407165376 |
| 16 | 1469568786235308 |
| 17 | 4495151581425648 |
| 18 | 12736262814039336 |