# A013700 (b-file synthesized from sequence entry)
1 1
2 128
3 6765
4 265720
5 9112264
6 290926848
7 8916942687
8 266668876540
9 7853149169635
10 228982270335000
11 6632994268595136
12 191292945772217856
13 5500214758962096400
14 157819424038439232000
15 4521902974531722618723