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 | 9 |
| 2 | 44 |
| 3 | 156 |
| 4 | 450 |
| 5 | 1122 |
| 6 | 2508 |
| 7 | 5149 |
| 8 | 9875 |
| 9 | 17910 |
| 10 | 31000 |
| 11 | 51567 |
| 12 | 82892 |
| 13 | 129330 |
| 14 | 196561 |
| 15 | 291880 |
| 16 | 424528 |
| 17 | 606067 |
| 18 | 850803 |
| 19 | 1176260 |
| 20 | 1603708 |
| 21 | 2158748 |
| 22 | 2871957 |
| 23 | 3779597 |
| 24 | 4924393 |
| 25 | 6356383 |
| 26 | 8133842 |
| 27 | 10324283 |
| 28 | 13005538 |
| 29 | 16266923 |
| 30 | 20210492 |
| 31 | 24952383 |
| 32 | 30624256 |
| 33 | 37374826 |
| 34 | 45371496 |
| 35 | 54802094 |
| 36 | 65876718 |
| 37 | 78829693 |
| 38 | 93921640 |
| 39 | 111441659 |
| 40 | 131709633 |