# A377339 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 20
4 144
5 1332
6 15920
7 225332
8 3758272
9 71711540
10 1544139216
11 37040248500
12 979378764320
13 28308318200372
14 887957701803952
15 30043664101434164
16 1090686549233837952
17 42290355849577306932
18 1744321111108101722768
19 76261355010301941319604