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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 10 |
| 5 | 22 |
| 6 | 45 |
| 7 | 93 |
| 8 | 190 |
| 9 | 387 |
| 10 | 783 |
| 11 | 1583 |
| 12 | 3191 |
| 13 | 6422 |
| 14 | 12907 |
| 15 | 25916 |
| 16 | 51993 |
| 17 | 104245 |
| 18 | 208902 |
| 19 | 418466 |
| 20 | 837994 |
| 21 | 1677694 |
| 22 | 3358127 |
| 23 | 6720661 |
| 24 | 13448413 |
| 25 | 26908246 |
| 26 | 53834890 |
| 27 | 107699435 |
| 28 | 215446685 |
| 29 | 430970500 |
| 30 | 862065453 |
| 31 | 1724331779 |
| 32 | 3448987855 |
| 33 | 6898499386 |