A218663 - OEIS

A218663 as a simple table

n	a(n)
1	1
2	3
3	3
4	5
5	15
6	5
7	9
8	57
9	57
10	9
11	17
12	225
13	417
14	225
15	17
16	31
17	891
18	3249
19	3249
20	891
21	31
22	57
23	3519
24	25533
25	50625
26	25533
27	3519
28	57
29	105
30	13905
31	199489
32	793881
33	793881
34	199489
35	13905
36	105
37	193
38	54945
39	1560161
40	12383361
41	24879489
42	12383361
43	1560161
44	54945

[1,3,3,5,15,5,9,57,57,9,17,225,417,225,17,31,891, 3249,3249,891,31,57,3519,25533,50625,25533,3519, 57,105,13905,199489,793881,793881,199489,13905, 105,193,54945,1560161,12383361,24879489,12383361, 1560161,54945]