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 | 4 |
| 3 | 8 |
| 4 | 22 |
| 5 | 33 |
| 6 | 66 |
| 7 | 131 |
| 8 | 262 |
| 9 | 515 |
| 10 | 1111 |
| 11 | 2112 |
| 12 | 4114 |
| 13 | 8228 |
| 14 | 16461 |
| 15 | 32823 |
| 16 | 65556 |
| 17 | 131131 |
| 18 | 262262 |
| 19 | 524425 |
| 20 | 1049401 |
| 21 | 2097902 |
| 22 | 4194914 |
| 23 | 8388838 |
| 24 | 16777761 |
| 25 | 33555533 |
| 26 | 67111176 |
| 27 | 134222431 |
| 28 | 268444862 |
| 29 | 536878635 |
| 30 | 1073773701 |
| 31 | 2147557412 |
| 32 | 4294994924 |
| 33 | 8589999858 |
| 34 | 17179897171 |