# A074501 (b-file synthesized from sequence entry)
0 3
1 8
2 30
3 134
4 642
5 3158
6 15690
7 78254
8 390882
9 1953638
10 9766650
11 48830174
12 244144722
13 1220711318
14 6103532010
15 30517610894
16 152587956162
17 762939584198
18 3814697527770
19 19073486852414
20 95367432689202
21 476837160300278