A217457 - OEIS

A217457 as a simple table

n	a(n)
1	3
2	3
3	3
4	9
5	15
6	9
7	17
8	69
9	69
10	17
11	37
12	253
13	613
14	253
15	37
16	77
17	1049
18	4361
19	4361
20	1049
21	77
22	163
23	4205
24	35067
25	60821
26	35067
27	4205
28	163
29	343
30	16887
31	271863
32	939819
33	939819
34	271863
35	16887
36	343
37	723
38	68015
39	2122623
40	14031423
41	28176327
42	14031423
43	2122623

[3,3,3,9,15,9,17,69,69,17,37,253,613,253,37,77, 1049,4361,4361,1049,77,163,4205,35067,60821,35067, 4205,163,343,16887,271863,939819,939819,271863, 16887,343,723,68015,2122623,14031423,28176327, 14031423,2122623]