# A156142 (b-file synthesized from sequence entry)
-1 1
0 2
1 3
2 7
3 27
4 137
5 873
6 6667
7 59427
8 605297
9 6936273
10 88315027
11 1236909627
12 18898578857
13 312811478073
14 5575974948187
15 106493278764627
16 2169463248814817
17 46958188870266273
18 1076202413702266147
19 26035005959162168427
20 662975982648919697177
21 17726672005071080580873