# A137158 (b-file synthesized from sequence entry)
0 1
1 4
2 22
3 228
4 4749
5 200240
6 17034964
7 2913479848
8 999402129243
9 686662003846640
10 944294243796543974
11 2598186366278914473948
12 14300408328085246335179009
13 157434326611214704329370130880