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 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 16 |
| 6 | 32 |
| 7 | 64 |
| 8 | 128 |
| 9 | 256 |
| 10 | 512 |
| 11 | 124 |
| 12 | 248 |
| 13 | 496 |
| 14 | 992 |
| 15 | 1984 |
| 16 | 3968 |
| 17 | 7936 |
| 18 | 15872 |
| 19 | 31744 |
| 20 | 63488 |
| 21 | 126976 |
| 22 | 253952 |
| 23 | 5794 |
| 24 | 11588 |
| 25 | 23176 |
| 26 | 46352 |
| 27 | 9274 |
| 28 | 18548 |
| 29 | 3796 |
| 30 | 7592 |
| 31 | 15184 |
| 32 | 3368 |
| 33 | 6736 |
| 34 | 13472 |
| 35 | 26944 |
| 36 | 53888 |
| 37 | 17776 |
| 38 | 35552 |
| 39 | 7114 |
| 40 | 14228 |
| 41 | 28456 |
| 42 | 56912 |
| 43 | 113824 |