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 | 4 |
| 2 | 68 |
| 3 | 91012 |
| 4 | 14151618 |
| 5 | 2021222425 |
| 6 | 262728303233 |
| 7 | 34353638394042 |
| 8 | 4445464849505152 |
| 9 | 545556575860626364 |
| 10 | 65666869707274757677 |
| 11 | 7880818284858687889091 |