# A080474 (b-file synthesized from sequence entry)
1 1
2 6
3 990
4 421200
5 379501200
6 625757605200
7 1707530790369600
8 7172573016426048000
9 43928207579534870592000
10 376055676152225153019936000
11 4350748615258091511751558272000