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 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 17 |
| 5 | 38 |
| 6 | 78 |
| 7 | 162 |
| 8 | 330 |
| 9 | 672 |
| 10 | 1355 |
| 11 | 2736 |
| 12 | 5503 |
| 13 | 11058 |
| 14 | 22191 |
| 15 | 44507 |
| 16 | 89198 |
| 17 | 178697 |
| 18 | 357852 |
| 19 | 716440 |
| 20 | 1434041 |
| 21 | 2869935 |
| 22 | 5742801 |
| 23 | 11490298 |
| 24 | 22988084 |
| 25 | 45988166 |
| 26 | 91995547 |
| 27 | 184021931 |
| 28 | 368093352 |
| 29 | 736266262 |
| 30 | 1472660452 |
| 31 | 2945526806 |
| 32 | 5891385159 |
| 33 | 11783304479 |