# A149543 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 13
4 55
5 183
6 797
7 2857
8 12745
9 48137
10 217181
11 848805
12 3864969
13 15476641
14 70950761
15 289401315
16 1333805235
17 5519509311
18 25548231703
19 106962811299
20 496860515253
21 2100326275693
22 9785578824799
23 41701885468869
24 194788901960581
25 835866986360113
26 3912959749894971
27 16891828897637735