A073343 - OEIS

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A073343 as a simple table

n	a(n)
1	1
2	1
3	1
4	6
5	33
6	75
7	877
8	2075
9	38692
10	239794
11	1250340
12	18495201
13	43023264
14	4554211553
15	70490483945
16	911526001064
17	182477118528
18	219638126087356
19	13070186026272
20	79249480638985626

[1,1,1,6,33,75,877,2075,38692,239794,1250340, 18495201,43023264,4554211553,70490483945, 911526001064,182477118528,219638126087356, 13070186026272,79249480638985626]