# A179493 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 12
4 108
5 1420
6 24660
7 541968
8 14547792
9 465228720
10 17385553440
11 747776581200
12 36566808933600
13 2012537262763872
14 123612631608883872
15 8412289268206662720
16 630378349868153698560
17 51733701375836221013760