# A002220 (b-file synthesized from sequence entry)
1 1
2 4
3 10
4 30
5 65
6 173
7 343
8 778
9 1518
10 3088
11 5609
12 10959
13 18990
14 34441
15 58903
16 102044
17 167499
18 282519
19 451529
20 737208
21 1160102
22 1836910
23 2828466
24 4410990
25 6670202
26 10161240
27 15186315
28 22758131
29 33480869