# A002974 (b-file synthesized from sequence entry)
1 1
2 1
3 4
4 7
5 11
6 20
7 35
8 59
9 99
10 165
11 270
12 443
13 723
14 1161
15 1861
16 2961
17 4654
18 7279
19 11317
20 17476
21 26879
22 41132
23 62601
24 94878
25 143172
26 215115
27 321995
28 480216
29 713655
30 1057192