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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 12 |
| 6 | 22 |
| 7 | 44 |
| 8 | 88 |
| 9 | 169 |
| 10 | 338 |
| 11 | 646 |
| 12 | 1292 |
| 13 | 2584 |
| 14 | 5055 |
| 15 | 10110 |
| 16 | 20220 |
| 17 | 39915 |
| 18 | 79830 |
| 19 | 157008 |
| 20 | 314016 |
| 21 | 628032 |
| 22 | 1244631 |
| 23 | 2489262 |
| 24 | 4978524 |
| 25 | 9899008 |
| 26 | 19798016 |
| 27 | 39596032 |
| 28 | 78879609 |
| 29 | 157759218 |
| 30 | 313777086 |
| 31 | 627554172 |
| 32 | 1255108344 |
| 33 | 2502016784 |
| 34 | 5004033568 |
| 35 | 10008067136 |
| 36 | 19971766007 |