# A013498 (b-file synthesized from sequence entry)
1 1
2 0
3 1
4 3
5 5
6 12
7 22
8 50
9 95
10 210
11 406
12 882
13 1722
14 3696
15 7260
16 15444
17 30459
18 64350
19 127270
20 267410
21 529958
22 1108536
23 2200276
24 4585308
25 9111830
26 18929092
27 37650172
28 78004500
29 155266100
30 320932800
31 639191160