# A024251 (b-file synthesized from sequence entry)
0 0
1 1
2 4
3 24
4 864
5 30592
6 1553920
7 117742464
8 11397335040
9 1412290109440
10 217673365676032
11 40748299759681536
12 9116312439290462208
13 2401574168877397737472
14 735827858439672282087424