# A177594 (b-file synthesized from sequence entry)
0 1
1 1
2 6
3 90
4 2520
5 113400
6 7484400
7 681040081
8 81715496353
9 12500505087678
10 2374643401938450
11 548423992273068450
12 151329242873227786290
13 49169594830177508466780
14 18581179389079670034395725
15 8080585890092465008705929001
16 4006831811683726939901512184106