# A064521 (b-file synthesized from sequence entry)
10 1
11 0
12 6
13 13
14 55
15 189
16 694
17 2516
18 9213
19 33782
20 124300
21 458502
22 1695469
23 6284175
24 23344173
25 86904615
26 324197100
27 1211841846
28 4538611107
29 17029834923
30 64014608376
31 241046175666
32 909171583214
33 3434698413540
34 12995770332449