# A107589 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 5
4 15
5 52
6 205
7 921
8 4807
9 30288
10 243338
11 2636799
12 39930125
13 851799936
14 25433798924
15 1055317281976
16 60604557533320
17 4808635126697325
18 526853206940116357
19 79701484897115170371
20 16651360300285759198344