# A149943 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 49
5 172
6 627
7 2374
8 9218
9 36536
10 147576
11 604114
12 2505636
13 10503384
14 44429132
15 189530129
16 814217984
17 3520596956
18 15311050911
19 66930619301
20 293971727765
21 1296689732244
22 5742062449808
23 25518877148421
24 113785729926120
25 508913759962817
26 2282592025746653
27 10264924766267955