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 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 18 |
| 7 | 28 |
| 8 | 40 |
| 9 | 162 |
| 10 | 280 |
| 11 | 440 |
| 12 | 1944 |
| 13 | 3640 |
| 14 | 6160 |
| 15 | 29160 |
| 16 | 58240 |
| 17 | 104720 |
| 18 | 524880 |
| 19 | 1106560 |
| 20 | 2094400 |
| 21 | 11022480 |
| 22 | 24344320 |
| 23 | 48171200 |
| 24 | 264539520 |
| 25 | 608608000 |
| 26 | 1252451200 |
| 27 | 7142567040 |
| 28 | 17041024000 |
| 29 | 36321084800 |
| 30 | 214277011200 |
| 31 | 528271744000 |
| 32 | 1162274713600 |