# A107979 (b-file synthesized from sequence entry)
0 2
1 9
2 40
3 178
4 792
5 3524
6 15680
7 69768
8 310432
9 1381264
10 6145920
11 27346208
12 121676672
13 541399104
14 2408949760
15 10718597248
16 47692288512
17 212206348544
18 944209971200
19 4201252581888
20 18693430269952
21 83176226243584