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 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 30 |
| 6 | 6 |
| 7 | 28 |
| 8 | 120 |
| 9 | 84 |
| 10 | 210 |
| 11 | 1650 |
| 12 | 210 |
| 13 | 11440 |
| 14 | 6930 |
| 15 | 630 |
| 16 | 9240 |
| 17 | 353430 |
| 18 | 93450 |
| 19 | 746130 |
| 20 | 1616160 |
| 21 | 746130 |
| 22 | 1021020 |
| 23 | 11104170 |
| 24 | 56705880 |
| 25 | 9722790 |
| 26 | 48498450 |
| 27 | 174594420 |
| 28 | 87297210 |
| 29 | 222071850 |
| 30 | 2114532420 |
| 31 | 11480905800 |
| 32 | 5375910540 |
| 33 | 42223261080 |
| 34 | 5603554110 |
| 35 | 2043061020 |