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 | 1 |
| 2 | 8 |
| 3 | 113 |
| 4 | 2325 |
| 5 | 62896 |
| 6 | 2109143 |
| 7 | 84403033 |
| 8 | 3924963750 |
| 9 | 207976793991 |
| 10 | 12369246804853 |
| 11 | 815880360117978 |
| 12 | 59107920881218525 |
| 13 | 4665585774576259261 |
| 14 | 398534278371999103888 |
| 15 | 36627974592437584634573 |
| 16 | 3603954453161886215458025 |
| 17 | 377983931878997401821759456 |
| 18 | 42095013846928585982896180123 |