# A148684 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 7
4 22
5 66
6 227
7 768
8 2753
9 9971
10 37279
11 140691
12 540745
13 2103349
14 8280868
15 32903529
16 131904514
17 533181995
18 2170444180
19 8892860703
20 36646858917
21 151866209400
22 632446821837
23 2645948283877
24 11116175518696
25 46888154457285
26 198501876181794
27 843238066609291
28 3593501683668228