# A366267 (b-file synthesized from sequence entry)
0 1
1 2
2 8
3 56
4 448
5 3920
6 36288
7 349440
8 3464448
9 35125760
10 362522624
11 3795914240
12 40224968704
13 430579701760
14 4648899846144
15 50568103690240
16 553632271155200
17 6096025799852032
18 67464070696927232
19 750003531943903232
20 8371814935842258944