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 | 1 |
| 3 | 4 |
| 4 | 4 |
| 5 | 12 |
| 6 | 18 |
| 7 | 44 |
| 8 | 72 |
| 9 | 158 |
| 10 | 288 |
| 11 | 604 |
| 12 | 1146 |
| 13 | 2332 |
| 14 | 4528 |
| 15 | 9126 |
| 16 | 17944 |
| 17 | 35940 |
| 18 | 71130 |
| 19 | 142132 |
| 20 | 282344 |
| 21 | 563630 |
| 22 | 1121936 |
| 23 | 2239060 |
| 24 | 4462530 |
| 25 | 8906236 |
| 26 | 17764160 |
| 27 | 35458774 |
| 28 | 70761520 |
| 29 | 141272876 |
| 30 | 282025466 |
| 31 | 563159588 |
| 32 | 1124543256 |
| 33 | 2245918406 |
| 34 | 4485670168 |
| 35 | 8960061076 |