# A027122 (b-file synthesized from sequence entry)
2 1
3 2
4 7
5 24
6 77
7 241
8 738
9 2227
10 6650
11 19711
12 58114
13 170682
14 499911
15 1461284
16 4265437
17 12438449
18 36247956
19 105589899
20 307513742
21 895514715
22 2607925982
23 7595726764
24 22127052759
25 64473303788
26 187912261301
27 547850119836