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 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 17 |
| 5 | 40 |
| 6 | 93 |
| 7 | 210 |
| 8 | 469 |
| 9 | 1036 |
| 10 | 2268 |
| 11 | 4928 |
| 12 | 10640 |
| 13 | 22848 |
| 14 | 48832 |
| 15 | 103936 |
| 16 | 220416 |
| 17 | 465920 |
| 18 | 982016 |
| 19 | 2064384 |
| 20 | 4329472 |
| 21 | 9060352 |
| 22 | 18923520 |
| 23 | 39452672 |
| 24 | 82116609 |
| 25 | 170655746 |
| 26 | 354156549 |
| 27 | 734003212 |
| 28 | 1519386652 |
| 29 | 3141533760 |
| 30 | 6488588432 |
| 31 | 13388218688 |
| 32 | 27598521024 |