# A052135 (b-file synthesized from sequence entry)
0 1
1 18
2 1080
3 408240
4 29393280
5 215550720
6 648499737600
7 953294614272000
8 2333665215737856000
9 7183021534041120768000
10 232066849561328517120000
11 723095875143672151080960000
12 74189636789740762700906496000000