# A007846 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 24
4 176
5 1504
6 14560
7 156768
8 1852512
9 23783264
10 329070176
11 4874845920
12 76898357216
13 1285734871520
14 22695759641440
15 421508294003424
16 8211642378316768