A143520 - cp's OEIS frontend

A143520 a(n) is n times number of divisors of n if n is odd, zero if n is twice odd, n times number of divisors of n/4 if n is divisible by 4.

n	a(n)
1	1
2	0
3	6
4	4
5	10
6	0
7	14
8	16
9	27
10	0
11	22
12	24
13	26
14	0
15	60
16	48
17	34
18	0
19	38
20	40
21	84
22	0
23	46
24	96
25	75
26	0
27	108
28	56
29	58
30	0
31	62
32	128
33	132
34	0
35	140
36	108
37	74
38	0
39	156
40	160
41	82
42	0
43	86
44	88
45	270
46	0
47	94
48	288
49	147
50	0
51	204
52	104
53	106
54	0
55	220
56	224
57	228
58	0
59	118
60	240
61	122
62	0
63	378
64	320
65	260
66	0
67	134
68	136

[1, 0, 6, 4, 10, 0, 14, 16, 27, 0, 22, 24, 26, 0, 60, 48, 34, 0, 38, 40, 84, 0, 46, 96, 75, 0, 108, 56, 58, 0, 62, 128, 132, 0, 140, 108, 74, 0, 156, 160, 82, 0, 86, 88, 270, 0, 94, 288, 147, 0, 204, 104, 106, 0, 220, 224, 228, 0, 118, 240, 122, 0, 378, 320, 260, 0, 134, 136]

cp's OEIS Frontend

A143520 a(n) is n times number of divisors of n if n is odd, zero if n is twice odd, n times number of divisors of n/4 if n is divisible by 4.

Table of values

List of values

n	a(n)
1	1
2	0
3	6
4	4
5	10
6	0
7	14
8	16
9	27
10	0
11	22
12	24
13	26
14	0
15	60
16	48
17	34
18	0
19	38
20	40
21	84
22	0
23	46
24	96
25	75
26	0
27	108
28	56
29	58
30	0
31	62
32	128
33	132
34	0
35	140
36	108
37	74
38	0
39	156
40	160
41	82
42	0
43	86
44	88
45	270
46	0
47	94
48	288
49	147
50	0
51	204
52	104
53	106
54	0
55	220
56	224
57	228
58	0
59	118
60	240
61	122
62	0
63	378
64	320
65	260
66	0
67	134
68	136

n	a(n)
1	1
2	0
3	6
4	4
5	10
6	0
7	14
8	16
9	27
10	0
11	22
12	24
13	26
14	0
15	60
16	48
17	34
18	0
19	38
20	40
21	84
22	0
23	46
24	96
25	75
26	0
27	108
28	56
29	58
30	0
31	62
32	128
33	132
34	0
35	140
36	108
37	74
38	0
39	156
40	160
41	82
42	0
43	86
44	88
45	270
46	0
47	94
48	288
49	147
50	0
51	204
52	104
53	106
54	0
55	220
56	224
57	228
58	0
59	118
60	240
61	122
62	0
63	378
64	320
65	260
66	0
67	134
68	136

n	a(n)
1	1
2	0
3	6
4	4
5	10
6	0
7	14
8	16
9	27
10	0
11	22
12	24
13	26
14	0
15	60
16	48
17	34
18	0
19	38
20	40
21	84
22	0
23	46
24	96
25	75
26	0
27	108
28	56
29	58
30	0
31	62
32	128
33	132
34	0
35	140
36	108
37	74
38	0
39	156
40	160
41	82
42	0
43	86
44	88
45	270
46	0
47	94
48	288
49	147
50	0
51	204
52	104
53	106
54	0
55	220
56	224
57	228
58	0
59	118
60	240
61	122
62	0
63	378
64	320
65	260
66	0
67	134
68	136