# A366758 (b-file synthesized from sequence entry)
0 3
1 3
2 4
3 8
4 31
5 133
6 832
7 5113
8 41044
9 388800
10 3958704
11 39916802
12 518682390
13 6302045232
14 90968651712
15 1332614649600
16 22844265373440
17 356226551466344
18 7504470340300800
19 123358411682195904
20 2432902126073962432
21 52279222588118377280
22 1175121515279802150144