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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 5 |
| 7 | 9 |
| 8 | 18 |
| 9 | 36 |
| 10 | 70 |
| 11 | 138 |
| 12 | 276 |
| 13 | 548 |
| 14 | 1096 |
| 15 | 2192 |
| 16 | 4374 |
| 17 | 8744 |
| 18 | 17486 |
| 19 | 34958 |
| 20 | 69916 |
| 21 | 139830 |
| 22 | 279630 |
| 23 | 559260 |
| 24 | 1118520 |
| 25 | 2236988 |
| 26 | 4473964 |
| 27 | 8947920 |
| 28 | 17895736 |
| 29 | 35791472 |
| 30 | 71582944 |
| 31 | 143165660 |
| 32 | 286331296 |
| 33 | 572662588 |
| 34 | 1145324764 |
| 35 | 2290649528 |