# A113956 (b-file synthesized from sequence entry)
0 1
1 3
2 12
3 48
4 194
5 787
6 3199
7 13017
8 52997
9 215831
10 879076
11 3580511
12 14582842
13 59388280
14 241829963
15 984609111
16 4008282780
17 16315179752
18 66399357417
19 270193396769
20 1099323033137
21 4472155924094
22 18190769442979
23 73982564102230