A187039 - cp's OEIS frontend

A187039 Numbers that have equal counts of even and odd exponents of primes in their factorization.

n	a(n)
1	1
2	12
3	18
4	20
5	28
6	44
7	45
8	48
9	50
10	52
11	63
12	68
13	72
14	75
15	76
16	80
17	92
18	98
19	99
20	108
21	112
22	116
23	117
24	124
25	147
26	148
27	153
28	162
29	164
30	171
31	172
32	175
33	176
34	188
35	192
36	200
37	207
38	208
39	212
40	236
41	242
42	244
43	245
44	261
45	268
46	272
47	275
48	279
49	284
50	288
51	292
52	304
53	316
54	320
55	325
56	332

[1, 12, 18, 20, 28, 44, 45, 48, 50, 52, 63, 68, 72, 75, 76, 80, 92, 98, 99, 108, 112, 116, 117, 124, 147, 148, 153, 162, 164, 171, 172, 175, 176, 188, 192, 200, 207, 208, 212, 236, 242, 244, 245, 261, 268, 272, 275, 279, 284, 288, 292, 304, 316, 320, 325, 332]

cp's OEIS Frontend

A187039 Numbers that have equal counts of even and odd exponents of primes in their factorization.

Table of values

List of values

n	a(n)
1	1
2	12
3	18
4	20
5	28
6	44
7	45
8	48
9	50
10	52
11	63
12	68
13	72
14	75
15	76
16	80
17	92
18	98
19	99
20	108
21	112
22	116
23	117
24	124
25	147
26	148
27	153
28	162
29	164
30	171
31	172
32	175
33	176
34	188
35	192
36	200
37	207
38	208
39	212
40	236
41	242
42	244
43	245
44	261
45	268
46	272
47	275
48	279
49	284
50	288
51	292
52	304
53	316
54	320
55	325
56	332

n	a(n)
1	1
2	12
3	18
4	20
5	28
6	44
7	45
8	48
9	50
10	52
11	63
12	68
13	72
14	75
15	76
16	80
17	92
18	98
19	99
20	108
21	112
22	116
23	117
24	124
25	147
26	148
27	153
28	162
29	164
30	171
31	172
32	175
33	176
34	188
35	192
36	200
37	207
38	208
39	212
40	236
41	242
42	244
43	245
44	261
45	268
46	272
47	275
48	279
49	284
50	288
51	292
52	304
53	316
54	320
55	325
56	332

n	a(n)
1	1
2	12
3	18
4	20
5	28
6	44
7	45
8	48
9	50
10	52
11	63
12	68
13	72
14	75
15	76
16	80
17	92
18	98
19	99
20	108
21	112
22	116
23	117
24	124
25	147
26	148
27	153
28	162
29	164
30	171
31	172
32	175
33	176
34	188
35	192
36	200
37	207
38	208
39	212
40	236
41	242
42	244
43	245
44	261
45	268
46	272
47	275
48	279
49	284
50	288
51	292
52	304
53	316
54	320
55	325
56	332