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 | 1057 |
| 5 | 15626 |
| 6 | 282252 |
| 7 | 5764802 |
| 8 | 134480385 |
| 9 | 3486843451 |
| 10 | 100048830174 |
| 11 | 3138428376722 |
| 12 | 107006334784468 |
| 13 | 3937376385699290 |
| 14 | 155572843119354936 |
| 15 | 6568408508343827972 |
| 16 | 295150156996346511361 |
| 17 | 14063084452067724991010 |
| 18 | 708236696816416252145973 |