A326643 - cp's OEIS frontend

A326643 Number of subsets of {1..n} whose mean and geometric mean are both integers.

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	11
10	12
11	13
12	16
13	17
14	18
15	19
16	22
17	23
18	30
19	31
20	32
21	33
22	34
23	35
24	41
25	46
26	47
27	70
28	71
29	72
30	73
31	74
32	102
33	103
34	104
35	105
36	143
37	144
38	145
39	146
40	151
41	152
42	153
43	154
44	155
45	161
46	162
47	163
48	244
49	252
50	280
51	281
52	282
53	283
54	409
55	410
56	416
57	417
58	418
59	419

[0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 12, 13, 16, 17, 18, 19, 22, 23, 30, 31, 32, 33, 34, 35, 41, 46, 47, 70, 71, 72, 73, 74, 102, 103, 104, 105, 143, 144, 145, 146, 151, 152, 153, 154, 155, 161, 162, 163, 244, 252, 280, 281, 282, 283, 409, 410, 416, 417, 418, 419]

cp's OEIS Frontend

A326643 Number of subsets of {1..n} whose mean and geometric mean are both integers.

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	11
10	12
11	13
12	16
13	17
14	18
15	19
16	22
17	23
18	30
19	31
20	32
21	33
22	34
23	35
24	41
25	46
26	47
27	70
28	71
29	72
30	73
31	74
32	102
33	103
34	104
35	105
36	143
37	144
38	145
39	146
40	151
41	152
42	153
43	154
44	155
45	161
46	162
47	163
48	244
49	252
50	280
51	281
52	282
53	283
54	409
55	410
56	416
57	417
58	418
59	419

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	11
10	12
11	13
12	16
13	17
14	18
15	19
16	22
17	23
18	30
19	31
20	32
21	33
22	34
23	35
24	41
25	46
26	47
27	70
28	71
29	72
30	73
31	74
32	102
33	103
34	104
35	105
36	143
37	144
38	145
39	146
40	151
41	152
42	153
43	154
44	155
45	161
46	162
47	163
48	244
49	252
50	280
51	281
52	282
53	283
54	409
55	410
56	416
57	417
58	418
59	419

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	11
10	12
11	13
12	16
13	17
14	18
15	19
16	22
17	23
18	30
19	31
20	32
21	33
22	34
23	35
24	41
25	46
26	47
27	70
28	71
29	72
30	73
31	74
32	102
33	103
34	104
35	105
36	143
37	144
38	145
39	146
40	151
41	152
42	153
43	154
44	155
45	161
46	162
47	163
48	244
49	252
50	280
51	281
52	282
53	283
54	409
55	410
56	416
57	417
58	418
59	419