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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 5 |
| 7 | 9 |
| 8 | 13 |
| 9 | 39 |
| 10 | 87 |
| 11 | 157 |
| 12 | 389 |
| 13 | 923 |
| 14 | 1899 |
| 15 | 4426 |
| 16 | 10582 |
| 17 | 23414 |
| 18 | 54022 |
| 19 | 128643 |
| 20 | 295735 |
| 21 | 686881 |
| 22 | 1631513 |
| 23 | 3825456 |
| 24 | 8974024 |
| 25 | 21330400 |
| 26 | 50550032 |
| 27 | 119644037 |
| 28 | 285176865 |
| 29 | 680215735 |
| 30 | 1621245503 |
| 31 | 3878312658 |
| 32 | 9293056066 |
| 33 | 22267588692 |
| 34 | 53463982624 |