A161700 - cp's OEIS frontend

A161700 a(n) is the sum of the elements on the antidiagonal of the difference table of the divisors of n.

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	13
7	13
8	15
9	19
10	17
11	21
12	28
13	25
14	21
15	41
16	31
17	33
18	59
19	37
20	21
21	53
22	29
23	45
24	39
25	61
26	33
27	65
28	49
29	57
30	171
31	61
32	63
33	77
34	41
35	117
36	61
37	73
38	45
39	89
40	-57
41	81
42	309
43	85
44	105
45	167
46	53
47	93
48	-80
49	127
50	61
51	113
52	133
53	105
54	321
55	173
56	183
57	125
58	65
59	117
60	-1039
61	121
62	69
63	155
64	127
65	201
66	333
67	133
68	189
69	149
70	-69
71	141
72	117
73	145
74	81
75	317
76	217
77	269

[1, 3, 5, 7, 9, 13, 13, 15, 19, 17, 21, 28, 25, 21, 41, 31, 33, 59, 37, 21, 53, 29, 45, 39, 61, 33, 65, 49, 57, 171, 61, 63, 77, 41, 117, 61, 73, 45, 89, -57, 81, 309, 85, 105, 167, 53, 93, -80, 127, 61, 113, 133, 105, 321, 173, 183, 125, 65, 117, -1039, 121, 69, 155, 127, 201, 333, 133, 189, 149, -69, 141, 117, 145, 81, 317, 217, 269]

cp's OEIS Frontend

A161700 a(n) is the sum of the elements on the antidiagonal of the difference table of the divisors of n.

Table of values

List of values