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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 8 |
| 5 | 19 |
| 6 | 43 |
| 7 | 94 |
| 8 | 201 |
| 9 | 423 |
| 10 | 880 |
| 11 | 1815 |
| 12 | 3719 |
| 13 | 7582 |
| 14 | 15397 |
| 15 | 31171 |
| 16 | 62952 |
| 17 | 126891 |
| 18 | 255379 |
| 19 | 513342 |
| 20 | 1030865 |
| 21 | 2068495 |
| 22 | 4147936 |
| 23 | 8313583 |
| 24 | 16655823 |
| 25 | 33358014 |
| 26 | 66791053 |
| 27 | 133703499 |
| 28 | 267603416 |
| 29 | 535524643 |
| 30 | 1071563515 |
| 31 | 2143959070 |
| 32 | 4289264409 |
| 33 | 8580707127 |