# A047093 (b-file synthesized from sequence entry)
2 1
3 3
4 8
5 19
6 98
7 335
8 1381
9 5164
10 20306
11 77915
12 303445
13 1175121
14 4574312
15 17794125
16 69379714
17 270671995
18 1057440462
19 4134573755
20 16182570293
21 63389522371
22 248511714532
23 974976349772
24 3827778946917
25 15037653341387