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 | 3 |
| 2 | 7 |
| 3 | 14 |
| 4 | 26 |
| 5 | 49 |
| 6 | 92 |
| 7 | 177 |
| 8 | 346 |
| 9 | 683 |
| 10 | 1356 |
| 11 | 2699 |
| 12 | 5384 |
| 13 | 10753 |
| 14 | 21490 |
| 15 | 42963 |
| 16 | 85908 |
| 17 | 171797 |
| 18 | 343574 |
| 19 | 687127 |
| 20 | 1374232 |
| 21 | 2748439 |
| 22 | 5496852 |
| 23 | 10993677 |
| 24 | 21987326 |
| 25 | 43974623 |
| 26 | 87949216 |
| 27 | 175898401 |
| 28 | 351796770 |
| 29 | 703593507 |
| 30 | 1407186980 |
| 31 | 2814373925 |
| 32 | 5628747814 |
| 33 | 11257495591 |