# A099760 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 26
4 158
5 1266
6 12662
7 151946
8 2127246
9 34035938
10 612646886
11 12252937722
12 269564629886
13 6469551117266
14 168208329048918
15 4709833213369706
16 141294996401091182
17 4521439884834917826
18 153728956084387206086