A349360 - cp's OEIS frontend

A349360 Number of positive integer pairs (s,t), with s,t <= n and s <= t such that either both s and t divide n or both do not.

n	a(n)
1	1
2	3
3	4
4	7
5	9
6	13
7	18
8	20
9	27
10	31
11	48
12	42
13	69
14	65
15	76
16	81
17	123
18	99
19	156
20	126
21	163
22	181
23	234
24	172
25	259
26	263
27	286
28	274
29	381
30	289
31	438
32	372
33	445
34	475
35	506
36	423
37	633
38	605
39	640
40	564
41	783
42	631
43	864
44	762
45	801
46	913
47	1038
48	796
49	1087
50	1011
51	1138
52	1102
53	1329
54	1117
55	1336
56	1212
57	1441

[1, 3, 4, 7, 9, 13, 18, 20, 27, 31, 48, 42, 69, 65, 76, 81, 123, 99, 156, 126, 163, 181, 234, 172, 259, 263, 286, 274, 381, 289, 438, 372, 445, 475, 506, 423, 633, 605, 640, 564, 783, 631, 864, 762, 801, 913, 1038, 796, 1087, 1011, 1138, 1102, 1329, 1117, 1336, 1212, 1441]

cp's OEIS Frontend

A349360 Number of positive integer pairs (s,t), with s,t <= n and s <= t such that either both s and t divide n or both do not.

Table of values

List of values