# A109469 (b-file synthesized from sequence entry)
1 0
2 2
3 5
4 9
5 49
6 259
7 1736
8 13408
9 117664
10 1153714
11 12492569
12 147987413
13 1903194061
14 26402007855
15 392928613560
16 6244069139240
17 105515436903720
18 1889249822655882
19 35726927316484053
20 711526052649064073