# A033452 (b-file synthesized from sequence entry)
0 0
1 1
2 5
3 22
4 99
5 471
6 2386
7 12867
8 73681
9 446620
10 2856457
11 19217243
12 135610448
13 1001159901
14 7714225057
15 61904585510
16 516347066551
17 4468588592739
18 40058673825258
19 371421499686007
20 3556976106133821