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 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 32 |
| 6 | 64 |
| 7 | 128 |
| 8 | 256 |
| 9 | 512 |
| 10 | 1024 |
| 11 | 2047 |
| 12 | 4092 |
| 13 | 8180 |
| 14 | 16352 |
| 15 | 32688 |
| 16 | 65344 |
| 17 | 130624 |
| 18 | 261120 |
| 19 | 521984 |
| 20 | 1043457 |
| 21 | 2085893 |
| 22 | 4169745 |
| 23 | 8335410 |
| 24 | 16662664 |
| 25 | 33309024 |
| 26 | 66585456 |
| 27 | 133105760 |
| 28 | 266081280 |
| 29 | 531902207 |
| 30 | 1063283962 |
| 31 | 2125527529 |
| 32 | 4248975286 |
| 33 | 8493793063 |