# A057818 (b-file synthesized from sequence entry)
1 0
2 1
3 6
4 33
5 108
6 345
7 1014
8 2865
9 7464
10 19791
11 51286
12 133249
13 340780
14 875487
15 2237862
16 5804489
17 14938614
18 38623851
19 100015302
20 259836689
21 674534218