# A367486 (b-file synthesized from sequence entry)
0 1
1 0
2 4
3 18
4 168
5 1830
6 24540
7 388122
8 7084560
9 146650446
10 3395460900
11 86962122786
12 2441210321880
13 74542218945558
14 2459830123779756
15 87236196407090730
16 3308881779086345760
17 133667058288336876894
18 5729380391745420070068