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 | 5 |
| 3 | 13 |
| 4 | 30 |
| 5 | 66 |
| 6 | 137 |
| 7 | 279 |
| 8 | 556 |
| 9 | 1104 |
| 10 | 2179 |
| 11 | 4309 |
| 12 | 8518 |
| 13 | 16886 |
| 14 | 33509 |
| 15 | 66643 |
| 16 | 132672 |
| 17 | 264492 |
| 18 | 527639 |
| 19 | 1053441 |
| 20 | 2104042 |
| 21 | 4204242 |
| 22 | 8402617 |
| 23 | 16797343 |
| 24 | 33582724 |
| 25 | 67149416 |
| 26 | 134274635 |
| 27 | 268516909 |
| 28 | 536985102 |
| 29 | 1073905134 |
| 30 | 2147712461 |
| 31 | 4295294379 |
| 32 | 8590392712 |
| 33 | 17180523876 |
| 34 | 34360655167 |
| 35 | 68720786713 |