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 | 3 |
| 2 | 5 |
| 3 | 9 |
| 4 | 18 |
| 5 | 36 |
| 6 | 71 |
| 7 | 138 |
| 8 | 268 |
| 9 | 522 |
| 10 | 1017 |
| 11 | 1980 |
| 12 | 3853 |
| 13 | 7498 |
| 14 | 14594 |
| 15 | 28406 |
| 16 | 55287 |
| 17 | 107604 |
| 18 | 209429 |
| 19 | 407614 |
| 20 | 793344 |
| 21 | 1544090 |
| 22 | 3005269 |
| 23 | 5849172 |
| 24 | 11384281 |
| 25 | 22157298 |
| 26 | 43124882 |
| 27 | 83934214 |
| 28 | 163361667 |
| 29 | 317951804 |
| 30 | 618831521 |
| 31 | 1204435526 |
| 32 | 2344200136 |
| 33 | 4562530890 |