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 | 3 |
| 2 | 262657 |
| 3 | 387440173 |
| 4 | 68719738881 |
| 5 | 3814699218751 |
| 6 | 101559966746113 |
| 7 | 1628413638264057 |
| 8 | 18014398643699713 |
| 9 | 150094635684419611 |
| 10 | 1000000001000000001 |
| 11 | 5559917315850179173 |
| 12 | 26623333286045024257 |
| 13 | 112455406962561892503 |
| 14 | 426878854231297789441 |
| 15 | 1477891880073843750001 |