# A306848 (b-file synthesized from sequence entry)
0 1
1 9
2 135
3 2835
4 70875
5 1913625
6 63149625
7 2210236875
8 86199238125
9 3878965715625
10 190069320065625
11 9693535323346875
12 533144442784078125
13 30389233238692453125
14 1914521694037624546875
15 124443910112445595546875
16 8586629797758746092734375