A268756 - cp's OEIS frontend

A268756 Number of triples x, y, r such that r divides xy, r divides at least one of x or y, and xy <= n.

n	a(n)
1	1
2	5
3	9
4	17
5	21
6	35
7	39
8	53
9	61
10	75
11	79
12	107
13	111
14	125
15	139
16	160
17	164
18	192
19	196
20	224
21	238
22	252
23	256
24	304
25	312
26	326
27	340
28	368
29	372
30	418
31	422
32	452
33	466
34	480
35	494
36	550
37	554
38	568
39	582
40	630
41	634
42	680
43	684
44	712
45	740
46	754
47	758
48	830
49	838
50	866
51	880
52	908
53	912
54	960
55	974

[1, 5, 9, 17, 21, 35, 39, 53, 61, 75, 79, 107, 111, 125, 139, 160, 164, 192, 196, 224, 238, 252, 256, 304, 312, 326, 340, 368, 372, 418, 422, 452, 466, 480, 494, 550, 554, 568, 582, 630, 634, 680, 684, 712, 740, 754, 758, 830, 838, 866, 880, 908, 912, 960, 974]

cp's OEIS Frontend

A268756 Number of triples x, y, r such that r divides xy, r divides at least one of x or y, and xy <= n.

Table of values

List of values

n	a(n)
1	1
2	5
3	9
4	17
5	21
6	35
7	39
8	53
9	61
10	75
11	79
12	107
13	111
14	125
15	139
16	160
17	164
18	192
19	196
20	224
21	238
22	252
23	256
24	304
25	312
26	326
27	340
28	368
29	372
30	418
31	422
32	452
33	466
34	480
35	494
36	550
37	554
38	568
39	582
40	630
41	634
42	680
43	684
44	712
45	740
46	754
47	758
48	830
49	838
50	866
51	880
52	908
53	912
54	960
55	974

n	a(n)
1	1
2	5
3	9
4	17
5	21
6	35
7	39
8	53
9	61
10	75
11	79
12	107
13	111
14	125
15	139
16	160
17	164
18	192
19	196
20	224
21	238
22	252
23	256
24	304
25	312
26	326
27	340
28	368
29	372
30	418
31	422
32	452
33	466
34	480
35	494
36	550
37	554
38	568
39	582
40	630
41	634
42	680
43	684
44	712
45	740
46	754
47	758
48	830
49	838
50	866
51	880
52	908
53	912
54	960
55	974

cp's OEIS Frontend

A268756 Number of triples x, y, r such that r divides x*y, r divides at least one of x or y, and x*y <= n.

Table of values

List of values

A268756 Number of triples x, y, r such that r divides xy, r divides at least one of x or y, and xy <= n.

n	a(n)
1	1
2	5
3	9
4	17
5	21
6	35
7	39
8	53
9	61
10	75
11	79
12	107
13	111
14	125
15	139
16	160
17	164
18	192
19	196
20	224
21	238
22	252
23	256
24	304
25	312
26	326
27	340
28	368
29	372
30	418
31	422
32	452
33	466
34	480
35	494
36	550
37	554
38	568
39	582
40	630
41	634
42	680
43	684
44	712
45	740
46	754
47	758
48	830
49	838
50	866
51	880
52	908
53	912
54	960
55	974