# A155371 (b-file synthesized from sequence entry)
4 1
5 4
6 13
7 28
8 49
9 110
10 920
11 6322
12 30236
13 123737
14 790167
15 10430919
16 142197770
17 1546938330
18 16600218633
19 257429254996
20 6152180165653