# A052970 (b-file synthesized from sequence entry)
0 1
1 0
2 2
3 2
4 8
5 16
6 44
7 104
8 264
9 648
10 1616
11 4000
12 9936
13 24640
14 61152
15 151712
16 376448
17 934016
18 2317504
19 5750144
20 14267264
21 35399808
22 87833856
23 217932800
24 540733696
25 1341665280
26 3328932352
27 8259727872
28 20493989888
29 50849570816
30 126167665664