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A002370 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 120 |
| 4 | 5250 |
| 5 | 395010 |
| 6 | 45197460 |
| 7 | 7299452160 |
| 8 | 1580682203100 |
| 9 | 441926274289500 |
| 10 | 154940341854097800 |
| 11 | 66565404923242024800 |
| 12 | 34389901168124209507800 |
| 13 | 21034386936107260971255000 |
| 14 | 15032296693671903309613950000 |
| 15 | 12411582569784462888618434640000 |
[1,1,6,120,5250,395010,45197460,7299452160, 1580682203100,441926274289500,154940341854097800, 66565404923242024800,34389901168124209507800, 21034386936107260971255000, 15032296693671903309613950000, 12411582569784462888618434640000] |