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 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 5 |
| 5 | 8 |
| 6 | 9 |
| 7 | 17 |
| 8 | 32 |
| 9 | 128 |
| 10 | 257 |
| 11 | 8192 |
| 12 | 65537 |
| 13 | 131072 |
| 14 | 524288 |
| 15 | 2147483648 |
| 16 | 2305843009213693952 |
| 17 | 618970019642690137449562112 |
| 18 | 162259276829213363391578010288128 |