A305808 - cp's OEIS frontend

A305808 Dirichlet convolution of A032742 (the largest proper divisor of n) with itself.

n	a(n)
1	1
2	2
3	2
4	5
5	2
6	8
7	2
8	12
9	7
10	12
11	2
12	22
13	2
14	16
15	12
16	28
17	2
18	30
19	2
20	34
21	16
22	24
23	2
24	56
25	11
26	28
27	24
28	46
29	2
30	56
31	2
32	64
33	24
34	36
35	16
36	87
37	2
38	40
39	28
40	88
41	2
42	76
43	2
44	70
45	46
46	48
47	2
48	136
49	15
50	70
51	36
52	82
53	2
54	108
55	24
56	120
57	40
58	60
59	2
60	172
61	2
62	64
63	62
64	144
65	28
66	116
67	2
68	106
69	48
70	108
71	2
72	228
73	2
74	76
75	70
76	118
77	24
78	136
79	2
80	216
81	81
82	84
83	2
84	236
85	36
86	88
87	60
88	184
89	2
90	228
91	28

[1, 2, 2, 5, 2, 8, 2, 12, 7, 12, 2, 22, 2, 16, 12, 28, 2, 30, 2, 34, 16, 24, 2, 56, 11, 28, 24, 46, 2, 56, 2, 64, 24, 36, 16, 87, 2, 40, 28, 88, 2, 76, 2, 70, 46, 48, 2, 136, 15, 70, 36, 82, 2, 108, 24, 120, 40, 60, 2, 172, 2, 64, 62, 144, 28, 116, 2, 106, 48, 108, 2, 228, 2, 76, 70, 118, 24, 136, 2, 216, 81, 84, 2, 236, 36, 88, 60, 184, 2, 228, 28]

cp's OEIS Frontend

A305808 Dirichlet convolution of A032742 (the largest proper divisor of n) with itself.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	5
5	2
6	8
7	2
8	12
9	7
10	12
11	2
12	22
13	2
14	16
15	12
16	28
17	2
18	30
19	2
20	34
21	16
22	24
23	2
24	56
25	11
26	28
27	24
28	46
29	2
30	56
31	2
32	64
33	24
34	36
35	16
36	87
37	2
38	40
39	28
40	88
41	2
42	76
43	2
44	70
45	46
46	48
47	2
48	136
49	15
50	70
51	36
52	82
53	2
54	108
55	24
56	120
57	40
58	60
59	2
60	172
61	2
62	64
63	62
64	144
65	28
66	116
67	2
68	106
69	48
70	108
71	2
72	228
73	2
74	76
75	70
76	118
77	24
78	136
79	2
80	216
81	81
82	84
83	2
84	236
85	36
86	88
87	60
88	184
89	2
90	228
91	28

n	a(n)
1	1
2	2
3	2
4	5
5	2
6	8
7	2
8	12
9	7
10	12
11	2
12	22
13	2
14	16
15	12
16	28
17	2
18	30
19	2
20	34
21	16
22	24
23	2
24	56
25	11
26	28
27	24
28	46
29	2
30	56
31	2
32	64
33	24
34	36
35	16
36	87
37	2
38	40
39	28
40	88
41	2
42	76
43	2
44	70
45	46
46	48
47	2
48	136
49	15
50	70
51	36
52	82
53	2
54	108
55	24
56	120
57	40
58	60
59	2
60	172
61	2
62	64
63	62
64	144
65	28
66	116
67	2
68	106
69	48
70	108
71	2
72	228
73	2
74	76
75	70
76	118
77	24
78	136
79	2
80	216
81	81
82	84
83	2
84	236
85	36
86	88
87	60
88	184
89	2
90	228
91	28

n	a(n)
1	1
2	2
3	2
4	5
5	2
6	8
7	2
8	12
9	7
10	12
11	2
12	22
13	2
14	16
15	12
16	28
17	2
18	30
19	2
20	34
21	16
22	24
23	2
24	56
25	11
26	28
27	24
28	46
29	2
30	56
31	2
32	64
33	24
34	36
35	16
36	87
37	2
38	40
39	28
40	88
41	2
42	76
43	2
44	70
45	46
46	48
47	2
48	136
49	15
50	70
51	36
52	82
53	2
54	108
55	24
56	120
57	40
58	60
59	2
60	172
61	2
62	64
63	62
64	144
65	28
66	116
67	2
68	106
69	48
70	108
71	2
72	228
73	2
74	76
75	70
76	118
77	24
78	136
79	2
80	216
81	81
82	84
83	2
84	236
85	36
86	88
87	60
88	184
89	2
90	228
91	28