# A071720 (b-file synthesized from sequence entry)
2 0
3 1
4 8
5 75
6 864
7 12005
8 196608
9 3720087
10 80000000
11 1929229929
12 51597803520
13 1516443410339
14 48594782035968
15 1686702392578125
16 63050394783186944
17 2525667398391013935
18 107946249863639334912
19 4903504030649559850577
20 235929600000000000000000