A178865 - OEIS

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A178865 as a simple table

n	a(n)
1	1
2	10
3	1
4	90
5	20
6	1
7	800
8	280
9	30
10	1
11	7101
12	3400
13	570
14	40
15	1
16	63010
17	38301
18	8800
19	960
20	50
21	1
22	559090
23	412020
24	120601
25	18000
26	1450
27	60
28	1
29	4960800
30	4296280
31	1530030
32	291001
33	32000
34	2040
35	70
36	1

[1,10,1,90,20,1,800,280,30,1,7101,3400,570,40,1, 63010,38301,8800,960,50,1,559090,412020,120601, 18000,1450,60,1,4960800,4296280,1530030,291001, 32000,2040,70,1]