# A159907 (b-file synthesized from sequence entry)
1 2
2 24
3 4320
4 4680
5 26208
6 8910720
7 17428320
8 20427264
9 91963648
10 197064960
11 8583644160
12 10200236032
13 21857648640
14 57575890944
15 57629644800
16 206166804480
17 17116004505600
18 1416963251404800
19 15338300494970880