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 | 6 |
| 3 | 12 |
| 4 | 23 |
| 5 | 46 |
| 6 | 98 |
| 7 | 213 |
| 8 | 458 |
| 9 | 972 |
| 10 | 2051 |
| 11 | 4322 |
| 12 | 9098 |
| 13 | 19113 |
| 14 | 40054 |
| 15 | 83748 |
| 16 | 174767 |
| 17 | 364086 |
| 18 | 757298 |
| 19 | 1572861 |
| 20 | 3262242 |
| 21 | 6757500 |
| 22 | 13981019 |
| 23 | 28894090 |
| 24 | 59652314 |
| 25 | 123032913 |
| 26 | 253522382 |
| 27 | 521957844 |
| 28 | 1073741831 |
| 29 | 2207135966 |
| 30 | 4533576578 |
| 31 | 9305762469 |
| 32 | 19088743546 |
| 33 | 39131924268 |