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 | 1 |
| 2 | 9 |
| 3 | 82 |
| 4 | 1073 |
| 5 | 15626 |
| 6 | 284567 |
| 7 | 5764802 |
| 8 | 134874369 |
| 9 | 3486981232 |
| 10 | 100146490520 |
| 11 | 3138428376722 |
| 12 | 107039261352736 |
| 13 | 3937376385699290 |
| 14 | 155587085803983069 |
| 15 | 6568409424129452048 |
| 16 | 295158038428838854657 |
| 17 | 14063084452067724991010 |
| 18 | 708242105301294465144506 |
| 19 | 37589973457545958193355602 |