# A148755 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 7
4 28
5 77
6 328
7 1032
8 4561
9 15405
10 69769
11 247393
12 1138185
13 4185511
14 19468674
15 73609812
16 345276471
17 1334269657
18 6299899585
19 24782227361
20 117622225218
21 469582616810
22 2238340131739
23 9048089976912
24 43283737012166
25 176845107923360
26 848544854956430
27 3499129672077487
28 16833433325704218