# A069135 (b-file synthesized from sequence entry)
0 1
1 4
2 144
3 20736
4 8294400
5 7464960000
6 13168189440000
7 41295442083840000
8 214075571762626560000
9 1734012131277275136000000
10 20981546788455029145600000000
11 365582471242040427832934400000000
12 8896815020146295851742291558400000000
13 294698100727325903793111665580441600000000