# A107404 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 26
4 144
5 962
6 7536
7 67706
8 685824
9 7730882
10 95970816
11 1300815386
12 19113775104
13 302616787202
14 5135568746496
15 92996021795066
16 1789758460329984
17 36479831022049922
18 785020114093080576
19 17785273588395966746