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 | 11 |
| 3 | 85 |
| 4 | 1127 |
| 5 | 15631 |
| 6 | 287021 |
| 7 | 5764809 |
| 8 | 135007759 |
| 9 | 3487020610 |
| 10 | 100146496681 |
| 11 | 3138428376733 |
| 12 | 107032667155169 |
| 13 | 3937376385699303 |
| 14 | 155582338242604221 |
| 15 | 6568408966322733475 |
| 16 | 295154660699054931999 |
| 17 | 14063084452067724991027 |
| 18 | 708239400347943609329270 |