# A087439 (b-file synthesized from sequence entry)
0 1
1 5
2 22
3 98
4 451
5 2135
6 10312
7 50468
8 249061
9 1235465
10 6147802
11 30650438
12 152986471
13 764135195
14 3818284492
15 19084248008
16 95399716681
17 476934013325
18 2384476356382
19 11921800651178
20 59607259863691
21 298031069141855