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 | 4 |
| 2 | 7 |
| 3 | 45 |
| 4 | 56 |
| 5 | 38163 |
| 6 | 61838 |
| 7 | 83618 |
| 8 | 346980 |
| 9 | 653021 |
| 10 | 950051 |
| 11 | 8647555 |
| 12 | 9534265 |
| 13 | 8167822283 |
| 14 | 9007920992 |
| 15 | 9209900792 |
| 16 | 9950000501 |
| 17 | 4737445289221 |
| 18 | 4990568257187 |
| 19 | 5009431742814 |
| 20 | 5262554710780 |
| 21 | 8373808925585 |
| 22 | 8626931893551 |
| 23 | 34323166122692 |
| 24 | 34532758615690 |
| 25 | 49625657225895 |
| 26 | 49835249718893 |