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 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 29 |
| 6 | 59 |
| 7 | 121 |
| 8 | 248 |
| 9 | 501 |
| 10 | 1008 |
| 11 | 2024 |
| 12 | 4064 |
| 13 | 8150 |
| 14 | 16323 |
| 15 | 32686 |
| 16 | 65418 |
| 17 | 130906 |
| 18 | 261913 |
| 19 | 523966 |
| 20 | 1048123 |
| 21 | 2096517 |
| 22 | 4193412 |
| 23 | 8387355 |
| 24 | 16775449 |
| 25 | 33551945 |
| 26 | 67105359 |
| 27 | 134212792 |
| 28 | 268428497 |
| 29 | 536861096 |
| 30 | 1073727974 |
| 31 | 2147464110 |
| 32 | 4294939718 |
| 33 | 8589895659 |