# A344218 (b-file synthesized from sequence entry)
0 0
1 1
2 5
3 26
4 126
5 408
6 -1704
7 -51696
8 -555408
9 -1217664
10 93550464
11 2424183552
12 30038190336
13 -114098181120
14 -16707096806400
15 -459530721441792
16 -5231858686838784
17 130925278326915072
18 9038174050387722240
19 246578101419998380032
20 1534994756662100557824