# A151340 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 2
4 4
5 8
6 28
7 108
8 372
9 1280
10 4776
11 18464
12 71840
13 282856
14 1134696
15 4623328
16 19044552
17 79217024
18 332678424
19 1409411128
20 6017276432
21 25869106896
22 111931476168
23 487189405200
24 2132112963608
25 9377901602688
26 41440635484904
27 183921242382848
28 819585479873264
29 3666044711577832