# A149398 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 51
5 160
6 746
7 2774
8 12874
9 48310
10 232026
11 931403
12 4450558
13 17919901
14 87171832
15 364069868
16 1763643203
17 7374086134
18 36118920595
19 154571795570
20 754561620858
21 3230281036786
22 15888894637334
23 69135164157601
24 339120054611314
25 1475539144373816
26 7278112663031766
27 32053476304760052