# A071733 (b-file synthesized from sequence entry)
0 1
1 4
2 14
3 49
4 171
5 599
6 2112
7 7501
8 26832
9 96628
10 350132
11 1275850
12 4672841
13 17193765
14 63531060
15 235647765
16 877118340
17 3275236800
18 12266009940
19 46061604510
20 173404343190
21 654313080174
22 2474251490448
23 9374968922354