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 | 6 |
| 2 | 62 |
| 3 | 618 |
| 4 | 6180 |
| 5 | 61804 |
| 6 | 618034 |
| 7 | 6180340 |
| 8 | 61803399 |
| 9 | 618033989 |
| 10 | 6180339888 |
| 11 | 61803398875 |
| 12 | 618033988750 |
| 13 | 6180339887499 |
| 14 | 61803398874990 |
| 15 | 618033988749895 |
| 16 | 6180339887498949 |
| 17 | 61803398874989485 |
| 18 | 618033988749894848 |
| 19 | 6180339887498948482 |
| 20 | 61803398874989484821 |