# A149923 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 47
5 159
6 567
7 2079
8 7920
9 30827
10 122432
11 495884
12 2034691
13 8466701
14 35632214
15 151397685
16 649417899
17 2806992134
18 12221505766
19 53565228368
20 236125050931
21 1046671869520
22 4662417859457
23 20863697406632
24 93761573243960
25 422995742344138
26 1915298621788458
27 8701706539380666