# A227459 (b-file synthesized from sequence entry)
1 1
2 2
3 12
4 116
5 1560
6 26934
7 568064
8 14155560
9 406944000
10 13257282090
11 482667389952
12 19421597033244
13 855882382817280
14 40996140612918750
15 2120732798100848640
16 117829899317371274064
17 6998139300214559047680
18 442442520059710968274770
19 29667507117025014218096640