A257847 - cp's OEIS frontend

A257847 a(n) = floor(n/7) * (n mod 7).

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	2
10	3
11	4
12	5
13	6
14	0
15	2
16	4
17	6
18	8
19	10
20	12
21	0
22	3
23	6
24	9
25	12
26	15
27	18
28	0
29	4
30	8
31	12
32	16
33	20
34	24
35	0
36	5
37	10
38	15
39	20
40	25
41	30
42	0
43	6
44	12
45	18
46	24
47	30
48	36
49	0
50	7
51	14
52	21
53	28
54	35
55	42
56	0
57	8
58	16
59	24
60	32
61	40
62	48
63	0
64	9
65	18
66	27
67	36
68	45
69	54
70	0
71	10
72	20

[0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 0, 2, 4, 6, 8, 10, 12, 0, 3, 6, 9, 12, 15, 18, 0, 4, 8, 12, 16, 20, 24, 0, 5, 10, 15, 20, 25, 30, 0, 6, 12, 18, 24, 30, 36, 0, 7, 14, 21, 28, 35, 42, 0, 8, 16, 24, 32, 40, 48, 0, 9, 18, 27, 36, 45, 54, 0, 10, 20]

cp's OEIS Frontend

A257847 a(n) = floor(n/7) * (n mod 7).

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	2
10	3
11	4
12	5
13	6
14	0
15	2
16	4
17	6
18	8
19	10
20	12
21	0
22	3
23	6
24	9
25	12
26	15
27	18
28	0
29	4
30	8
31	12
32	16
33	20
34	24
35	0
36	5
37	10
38	15
39	20
40	25
41	30
42	0
43	6
44	12
45	18
46	24
47	30
48	36
49	0
50	7
51	14
52	21
53	28
54	35
55	42
56	0
57	8
58	16
59	24
60	32
61	40
62	48
63	0
64	9
65	18
66	27
67	36
68	45
69	54
70	0
71	10
72	20

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	2
10	3
11	4
12	5
13	6
14	0
15	2
16	4
17	6
18	8
19	10
20	12
21	0
22	3
23	6
24	9
25	12
26	15
27	18
28	0
29	4
30	8
31	12
32	16
33	20
34	24
35	0
36	5
37	10
38	15
39	20
40	25
41	30
42	0
43	6
44	12
45	18
46	24
47	30
48	36
49	0
50	7
51	14
52	21
53	28
54	35
55	42
56	0
57	8
58	16
59	24
60	32
61	40
62	48
63	0
64	9
65	18
66	27
67	36
68	45
69	54
70	0
71	10
72	20

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	2
10	3
11	4
12	5
13	6
14	0
15	2
16	4
17	6
18	8
19	10
20	12
21	0
22	3
23	6
24	9
25	12
26	15
27	18
28	0
29	4
30	8
31	12
32	16
33	20
34	24
35	0
36	5
37	10
38	15
39	20
40	25
41	30
42	0
43	6
44	12
45	18
46	24
47	30
48	36
49	0
50	7
51	14
52	21
53	28
54	35
55	42
56	0
57	8
58	16
59	24
60	32
61	40
62	48
63	0
64	9
65	18
66	27
67	36
68	45
69	54
70	0
71	10
72	20