# A148663 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 6
4 25
5 69
6 306
7 968
8 4495
9 15457
10 73187
11 265886
12 1276200
13 4822808
14 23356328
15 90916036
16 443070045
17 1764876843
18 8640616651
19 35059209106
20 172241437579
21 709515169465
22 3495119780527
23 14580289703320
24 71975955298661
25 303483724749584
26 1500714793344535
27 6386054657765297
28 31622910371957637