# A156306 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 26
4 292
5 3468
6 69664
7 1208936
8 32822456
9 858979216
10 28933584112
11 836115182512
12 40673697842208
13 1381857061152896
14 67261437417875776
15 3297904559465926208
16 192628214559932492928
17 8815748379077085483264