A015730 - OEIS

A015730 as a simple table

n	a(n)
1	1
2	2
3	4
4	9
5	16
6	18
7	25
8	50
9	64
10	144
11	289
12	576
13	578
14	729
15	1458
16	1600
17	1681
18	2401
19	2916
20	3362
21	3481
22	3600
23	4096
24	4624
25	4802
26	5041
27	6962
28	7921
29	9604
30	10082
31	10201
32	11664
33	15625
34	15842
35	17161
36	18225
37	18496
38	20402
39	21609
40	24400
41	26896
42	27889

[1,2,4,9,16,18,25,50,64,144,289,576,578,729,1458, 1600,1681,2401,2916,3362,3481,3600,4096,4624,4802, 5041,6962,7921,9604,10082,10201,11664,15625,15842, 17161,18225,18496,20402,21609,24400,26896,27889]