A075400 - OEIS

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A075400 as a simple table

n	a(n)
1	1
2	1
3	37
4	28
5	1
6	1852
7	3016
8	138889
9	12345679
10	0
11	0
12	925925926
13	1624008547
14	8007936508
15	740740741
16	694444444507
17	12418300654183
18	617283950617284
19	1111111116374269
20	0
21	1005291005291005291
22	959595959595959596

[1,1,37,28,1,1852,3016,138889,12345679,0,0, 925925926,1624008547,8007936508,740740741, 694444444507,12418300654183,617283950617284, 1111111116374269,0,1005291005291005291, 959595959595959596]