# A074355 (b-file synthesized from sequence entry)
0 0
1 0
2 0
3 3
4 15
5 45
6 147
7 402
8 1134
9 2991
10 7917
11 20367
12 52167
13 131748
14 330876
15 824187
16 2042763
17 5035473
18 12361755
19 30226614
20 73664298
21 178971879
22 433649769
23 1048133619
24 2527706127
25 6083434824
26 14613750648
27 35045236083
28 83909261319