A378648 - cp's OEIS frontend

A378648 Dirichlet convolution of A067824 and A103977, where A067824 is the number of strict chains of divisors starting with n, and A103977 is the Zumkeller deficiency of n.

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	15
9	13
10	18
11	12
12	32
13	14
14	24
15	24
16	31
17	18
18	43
19	20
20	44
21	32
22	36
23	24
24	80
25	31
26	42
27	40
28	56
29	30
30	84
31	32
32	63
33	48
34	54
35	48
36	127
37	38
38	60
39	56
40	104
41	42
42	108
43	44
44	84
45	78
46	72
47	48
48	192
49	57
50	93
51	72
52	98
53	54
54	140
55	72
56	128
57	80
58	90
59	60
60	252
61	62
62	96
63	104
64	127
65	84
66	156
67	68
68	126
69	96
70	148
71	72
72	351
73	74
74	114
75	124
76	140
77	96

[1, 3, 4, 7, 6, 12, 8, 15, 13, 18, 12, 32, 14, 24, 24, 31, 18, 43, 20, 44, 32, 36, 24, 80, 31, 42, 40, 56, 30, 84, 32, 63, 48, 54, 48, 127, 38, 60, 56, 104, 42, 108, 44, 84, 78, 72, 48, 192, 57, 93, 72, 98, 54, 140, 72, 128, 80, 90, 60, 252, 62, 96, 104, 127, 84, 156, 68, 126, 96, 148, 72, 351, 74, 114, 124, 140, 96]

cp's OEIS Frontend

A378648 Dirichlet convolution of A067824 and A103977, where A067824 is the number of strict chains of divisors starting with n, and A103977 is the Zumkeller deficiency of n.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	15
9	13
10	18
11	12
12	32
13	14
14	24
15	24
16	31
17	18
18	43
19	20
20	44
21	32
22	36
23	24
24	80
25	31
26	42
27	40
28	56
29	30
30	84
31	32
32	63
33	48
34	54
35	48
36	127
37	38
38	60
39	56
40	104
41	42
42	108
43	44
44	84
45	78
46	72
47	48
48	192
49	57
50	93
51	72
52	98
53	54
54	140
55	72
56	128
57	80
58	90
59	60
60	252
61	62
62	96
63	104
64	127
65	84
66	156
67	68
68	126
69	96
70	148
71	72
72	351
73	74
74	114
75	124
76	140
77	96

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	15
9	13
10	18
11	12
12	32
13	14
14	24
15	24
16	31
17	18
18	43
19	20
20	44
21	32
22	36
23	24
24	80
25	31
26	42
27	40
28	56
29	30
30	84
31	32
32	63
33	48
34	54
35	48
36	127
37	38
38	60
39	56
40	104
41	42
42	108
43	44
44	84
45	78
46	72
47	48
48	192
49	57
50	93
51	72
52	98
53	54
54	140
55	72
56	128
57	80
58	90
59	60
60	252
61	62
62	96
63	104
64	127
65	84
66	156
67	68
68	126
69	96
70	148
71	72
72	351
73	74
74	114
75	124
76	140
77	96

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	15
9	13
10	18
11	12
12	32
13	14
14	24
15	24
16	31
17	18
18	43
19	20
20	44
21	32
22	36
23	24
24	80
25	31
26	42
27	40
28	56
29	30
30	84
31	32
32	63
33	48
34	54
35	48
36	127
37	38
38	60
39	56
40	104
41	42
42	108
43	44
44	84
45	78
46	72
47	48
48	192
49	57
50	93
51	72
52	98
53	54
54	140
55	72
56	128
57	80
58	90
59	60
60	252
61	62
62	96
63	104
64	127
65	84
66	156
67	68
68	126
69	96
70	148
71	72
72	351
73	74
74	114
75	124
76	140
77	96