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 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 32 |
| 6 | 63 |
| 7 | 124 |
| 8 | 244 |
| 9 | 480 |
| 10 | 944 |
| 11 | 1857 |
| 12 | 3653 |
| 13 | 7186 |
| 14 | 14136 |
| 15 | 27808 |
| 16 | 54703 |
| 17 | 107610 |
| 18 | 211687 |
| 19 | 416424 |
| 20 | 819176 |
| 21 | 1611457 |
| 22 | 3170007 |
| 23 | 6235937 |
| 24 | 12267137 |
| 25 | 24131522 |
| 26 | 47470763 |
| 27 | 93382976 |
| 28 | 183700022 |
| 29 | 361368844 |
| 30 | 710873303 |
| 31 | 1398407365 |
| 32 | 2750902517 |
| 33 | 5411487988 |