A377816 - cp's OEIS frontend

A377816 Numbers that have a single even exponent in their prime factorization.

n	a(n)
1	4
2	9
3	12
4	16
5	18
6	20
7	25
8	28
9	44
10	45
11	48
12	49
13	50
14	52
15	60
16	63
17	64
18	68
19	72
20	75
21	76
22	80
23	81
24	84
25	90
26	92
27	98
28	99
29	108
30	112
31	116
32	117
33	121
34	124
35	126
36	132
37	140
38	147
39	148
40	150
41	153
42	156
43	162
44	164
45	169
46	171
47	172
48	175
49	176
50	188
51	192
52	198
53	200
54	204
55	207
56	208
57	212
58	220
59	228

[4, 9, 12, 16, 18, 20, 25, 28, 44, 45, 48, 49, 50, 52, 60, 63, 64, 68, 72, 75, 76, 80, 81, 84, 90, 92, 98, 99, 108, 112, 116, 117, 121, 124, 126, 132, 140, 147, 148, 150, 153, 156, 162, 164, 169, 171, 172, 175, 176, 188, 192, 198, 200, 204, 207, 208, 212, 220, 228]

cp's OEIS Frontend

A377816 Numbers that have a single even exponent in their prime factorization.

Table of values

List of values

n	a(n)
1	4
2	9
3	12
4	16
5	18
6	20
7	25
8	28
9	44
10	45
11	48
12	49
13	50
14	52
15	60
16	63
17	64
18	68
19	72
20	75
21	76
22	80
23	81
24	84
25	90
26	92
27	98
28	99
29	108
30	112
31	116
32	117
33	121
34	124
35	126
36	132
37	140
38	147
39	148
40	150
41	153
42	156
43	162
44	164
45	169
46	171
47	172
48	175
49	176
50	188
51	192
52	198
53	200
54	204
55	207
56	208
57	212
58	220
59	228

n	a(n)
1	4
2	9
3	12
4	16
5	18
6	20
7	25
8	28
9	44
10	45
11	48
12	49
13	50
14	52
15	60
16	63
17	64
18	68
19	72
20	75
21	76
22	80
23	81
24	84
25	90
26	92
27	98
28	99
29	108
30	112
31	116
32	117
33	121
34	124
35	126
36	132
37	140
38	147
39	148
40	150
41	153
42	156
43	162
44	164
45	169
46	171
47	172
48	175
49	176
50	188
51	192
52	198
53	200
54	204
55	207
56	208
57	212
58	220
59	228

n	a(n)
1	4
2	9
3	12
4	16
5	18
6	20
7	25
8	28
9	44
10	45
11	48
12	49
13	50
14	52
15	60
16	63
17	64
18	68
19	72
20	75
21	76
22	80
23	81
24	84
25	90
26	92
27	98
28	99
29	108
30	112
31	116
32	117
33	121
34	124
35	126
36	132
37	140
38	147
39	148
40	150
41	153
42	156
43	162
44	164
45	169
46	171
47	172
48	175
49	176
50	188
51	192
52	198
53	200
54	204
55	207
56	208
57	212
58	220
59	228