# A305543 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 3
5 24
6 124
7 588
8 2487
9 10240
10 40488
11 158220
12 609078
13 2333520
14 8895204
15 33864364
16 128793627
17 490027200
18 1865625340
19 7110959340
20 27138210888
21 103717720000
22 396965694444
23 1521562700988
24 5840509760582
25 22450188684288
26 86412088367640
27 333035003543900
28 1285108410802038
29 4964755661788560
30 19201631174055992