# A151258 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 12
5 28
6 86
7 228
8 736
9 2070
10 6868
11 20212
12 68300
13 207620
14 711694
15 2217096
16 7683384
17 24405062
18 85318256
19 275290932
20 969323508
21 3168559356
22 11223800316
23 37092325140
24 132060026316
25 440527174396
26 1575294513724
27 5297495810812
28 19015832114996
29 64400390557052
30 231947048982446
31 790430109713200