# A307363 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 20
4 218
5 3514
6 77386
7 2220504
8 80085792
9 3533917704
10 186779329704
11 11623513158960
12 839754709300800
13 69603737430736560
14 6552428441847854640
15 694531396130434062720
16 82265733994694038784640
17 10816812417663289139328000
18 1569560370536552329095091200