# A000103 (b-file synthesized from sequence entry)
4 0
5 0
6 1
7 1
8 2
9 5
10 12
11 34
12 130
13 525
14 2472
15 12400
16 65619
17 357504
18 1992985
19 11284042
20 64719885
21 375126827
22 2194439398
23 12941995397
24 76890024027
25 459873914230
26 2767364341936
27 16747182732792