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 | 13 |
| 2 | 115 |
| 3 | 1063 |
| 4 | 10255 |
| 5 | 101023 |
| 6 | 1004095 |
| 7 | 10016383 |
| 8 | 100065535 |
| 9 | 1000262143 |
| 10 | 10001048575 |
| 11 | 100004194303 |
| 12 | 1000016777215 |
| 13 | 10000067108863 |
| 14 | 100000268435455 |
| 15 | 1000001073741823 |
| 16 | 10000004294967295 |
| 17 | 100000017179869183 |