# A275206 (b-file synthesized from sequence entry)
0 0
1 0
2 0
3 2
4 6
5 24
6 80
7 286
8 994
9 3536
10 12576
11 45220
12 163372
13 594320
14 2172768
15 7983990
16 29464010
17 109174560
18 405990464
19 1514797020
20 5669004692
21 21275014800
22 80047213792
23 301892460012
24 1141068949396
25 4321730134624
26 16399422014400
27 62340424959176
28 237373155238104
29 905251034394784