# A306391 (b-file synthesized from sequence entry)
1 0
2 12
3 2484
4 1557792
5 2560572000
6 9326330280000
7 66250877823900000
8 834917902101803520000
9 17373747843395915811840000
10 564479089176417832085760000000
11 27382950623629177584815808000000000
12 1912097851374544604017590025267200000000
13 186429568131038636125345650494922854400000000