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 | 0 |
| 3 | 2 |
| 4 | 1 |
| 5 | 1 |
| 6 | 8 |
| 7 | 7 |
| 8 | 9 |
| 9 | 20 |
| 10 | 49 |
| 11 | 72 |
| 12 | 115 |
| 13 | 202 |
| 14 | 349 |
| 15 | 695 |
| 16 | 1171 |
| 17 | 2009 |
| 18 | 3530 |
| 19 | 6203 |
| 20 | 10818 |
| 21 | 19320 |
| 22 | 33961 |
| 23 | 59449 |
| 24 | 104349 |
| 25 | 183370 |
| 26 | 321635 |
| 27 | 564081 |
| 28 | 992513 |
| 29 | 1741441 |
| 30 | 3057547 |
| 31 | 5363570 |
| 32 | 9410785 |
| 33 | 16516575 |
| 34 | 28967505 |
| 35 | 50798456 |
| 36 | 89106542 |
| 37 | 156276871 |
| 38 | 274037619 |
| 39 | 480437247 |
| 40 | 842350671 |
| 41 | 1476760717 |
| 42 | 2588651452 |
| 43 | 4537418431 |
| 44 | 7952741429 |
| 45 | 13938276465 |