A227800 - cp's OEIS frontend

A227800 Number of different values the product p*q can have where p >= 1, q >= 1 with p+q < n.

n	a(n)
1	0
2	0
3	1
4	2
5	4
6	5
7	8
8	10
9	13
10	16
11	19
12	21
13	26
14	29
15	34
16	39
17	44
18	48
19	53
20	58
21	65
22	71
23	78
24	83
25	91
26	97
27	104
28	111
29	118
30	124
31	134
32	141
33	150
34	158
35	167
36	176
37	186
38	194
39	204
40	213
41	224
42	232
43	245
44	254
45	267
46	278
47	290
48	301
49	315
50	328
51	339
52	351
53	366
54	376
55	391
56	404
57	419
58	432
59	446

[0, 0, 1, 2, 4, 5, 8, 10, 13, 16, 19, 21, 26, 29, 34, 39, 44, 48, 53, 58, 65, 71, 78, 83, 91, 97, 104, 111, 118, 124, 134, 141, 150, 158, 167, 176, 186, 194, 204, 213, 224, 232, 245, 254, 267, 278, 290, 301, 315, 328, 339, 351, 366, 376, 391, 404, 419, 432, 446]

cp's OEIS Frontend

A227800 Number of different values the product p*q can have where p >= 1, q >= 1 with p+q < n.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	2
5	4
6	5
7	8
8	10
9	13
10	16
11	19
12	21
13	26
14	29
15	34
16	39
17	44
18	48
19	53
20	58
21	65
22	71
23	78
24	83
25	91
26	97
27	104
28	111
29	118
30	124
31	134
32	141
33	150
34	158
35	167
36	176
37	186
38	194
39	204
40	213
41	224
42	232
43	245
44	254
45	267
46	278
47	290
48	301
49	315
50	328
51	339
52	351
53	366
54	376
55	391
56	404
57	419
58	432
59	446

n	a(n)
1	0
2	0
3	1
4	2
5	4
6	5
7	8
8	10
9	13
10	16
11	19
12	21
13	26
14	29
15	34
16	39
17	44
18	48
19	53
20	58
21	65
22	71
23	78
24	83
25	91
26	97
27	104
28	111
29	118
30	124
31	134
32	141
33	150
34	158
35	167
36	176
37	186
38	194
39	204
40	213
41	224
42	232
43	245
44	254
45	267
46	278
47	290
48	301
49	315
50	328
51	339
52	351
53	366
54	376
55	391
56	404
57	419
58	432
59	446

n	a(n)
1	0
2	0
3	1
4	2
5	4
6	5
7	8
8	10
9	13
10	16
11	19
12	21
13	26
14	29
15	34
16	39
17	44
18	48
19	53
20	58
21	65
22	71
23	78
24	83
25	91
26	97
27	104
28	111
29	118
30	124
31	134
32	141
33	150
34	158
35	167
36	176
37	186
38	194
39	204
40	213
41	224
42	232
43	245
44	254
45	267
46	278
47	290
48	301
49	315
50	328
51	339
52	351
53	366
54	376
55	391
56	404
57	419
58	432
59	446