# A069134 (b-file synthesized from sequence entry)
0 0
1 9
2 144
3 2916
4 82944
5 3240000
6 167961600
7 11202105600
8 936404582400
9 95996101017600
10 11851370496000000
11 1735159154319360000
12 297357522512117760000
13 58977973614365245440000
14 13406496061357723484160000
15 3462774811766503833600000000