# A121177 (b-file synthesized from sequence entry)
1 0
2 2
3 12
4 62
5 312
6 1562
7 7812
8 39062
9 195312
10 976562
11 4882812
12 24414062
13 122070312
14 610351562
15 3051757812
16 15258789062
17 76293945312
18 381469726562
19 1907348632812
20 9536743164062
21 47683715820312
22 238418579101562
23 1192092895507812
24 5960464477539062
25 29802322387695312