# A084329 (b-file synthesized from sequence entry)
0 0
1 1
2 20
3 380
4 7200
5 136400
6 2584000
7 48952000
8 927360000
9 17568160000
10 332816000000
11 6304956800000
12 119442816000000
13 2262757184000000
14 42866287360000000
15 812070603520000000
16 15384086323200000000