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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 7 |
| 6 | 14 |
| 7 | 30 |
| 8 | 62 |
| 9 | 129 |
| 10 | 263 |
| 11 | 534 |
| 12 | 1076 |
| 13 | 2160 |
| 14 | 4318 |
| 15 | 8612 |
| 16 | 17145 |
| 17 | 34097 |
| 18 | 67764 |
| 19 | 134638 |
| 20 | 267506 |
| 21 | 531606 |
| 22 | 1056812 |
| 23 | 2101854 |
| 24 | 4182462 |
| 25 | 8327263 |
| 26 | 16588973 |
| 27 | 33066080 |
| 28 | 65945522 |
| 29 | 131588128 |
| 30 | 262702054 |
| 31 | 524699094 |
| 32 | 1048433468 |
| 33 | 2095744336 |