# A276230 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 12
4 36
5 144
6 720
7 3600
8 25200
9 176400
10 1587600
11 17463600
12 192099600
13 2497294800
14 32464832400
15 551902150800
16 9382336563600
17 178264394708400
18 3387023499459600
19 77901540487570800
20 1791735431214128400
21 44793385780353210000
22 1299008187630243090000