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 | 2 |
| 1 | 3 |
| 2 | 7 |
| 3 | 15 |
| 4 | 29 |
| 5 | 53 |
| 6 | 95 |
| 7 | 171 |
| 8 | 313 |
| 9 | 585 |
| 10 | 1115 |
| 11 | 2159 |
| 12 | 4229 |
| 13 | 8349 |
| 14 | 16567 |
| 15 | 32979 |
| 16 | 65777 |
| 17 | 131345 |
| 18 | 262451 |
| 19 | 524631 |
| 20 | 1048957 |
| 21 | 2097573 |
| 22 | 4194767 |
| 23 | 8389115 |
| 24 | 16777769 |
| 25 | 33555033 |
| 26 | 67109515 |
| 27 | 134218431 |
| 28 | 268436213 |
| 29 | 536871725 |
| 30 | 1073742695 |
| 31 | 2147484579 |
| 32 | 4294968289 |
| 33 | 8589935649 |