# A371693 (b-file synthesized from sequence entry)
0 1
1 4
2 28
3 248
4 2480
5 26688
6 301648
7 3531424
8 42449088
9 520858496
10 6497190528
11 82146802944
12 1050370074624
13 13559126110720
14 176469550681344
15 2313050095245824
16 30506619439926272
17 404558181197010944
18 5391161355764205568
19 72156618656648237056
20 969557980700415827968