# A120599 (b-file synthesized from sequence entry)
0 1
1 4
2 20
3 280
4 4660
5 86728
6 1727880
7 36047280
8 777470580
9 17195957480
10 387906427480
11 8890184148560
12 206419640698440
13 4845319424269520
14 114791477960006800
15 2741248077305459040
16 65915164046356799220