# A037560 (b-file synthesized from sequence entry)
1 2
2 8
3 25
4 77
5 233
6 700
7 2102
8 6308
9 18925
10 56777
11 170333
12 511000
13 1533002
14 4599008
15 13797025
16 41391077
17 124173233
18 372519700
19 1117559102
20 3352677308
21 10058031925
22 30174095777
23 90522287333
24 271566862000
25 814700586002