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 | 6 |
| 6 | 10 |
| 7 | 20 |
| 8 | 37 |
| 9 | 74 |
| 10 | 142 |
| 11 | 284 |
| 12 | 558 |
| 13 | 1116 |
| 14 | 2212 |
| 15 | 4424 |
| 16 | 8811 |
| 17 | 17622 |
| 18 | 35170 |
| 19 | 70340 |
| 20 | 140538 |
| 21 | 281076 |
| 22 | 561868 |
| 23 | 1123736 |
| 24 | 2246914 |
| 25 | 4493828 |
| 26 | 8986540 |
| 27 | 17973080 |
| 28 | 35943948 |
| 29 | 71887896 |
| 30 | 143771368 |
| 31 | 287542736 |
| 32 | 575076661 |
| 33 | 1150153322 |
| 34 | 2300289022 |
| 35 | 4600578044 |
| 36 | 9201120918 |