A381801 - cp's OEIS frontend

A381801 Irregular triangle read by rows: row n lists the residues r mod n of numbers k such that rad(k) | n, where rad = A007947.

n	a(n)
1	0
2	0
3	1
4	0
5	1
6	0
7	1
8	2
9	0
10	1
11	0
12	1
13	2
14	3
15	4
16	0
17	1
18	0
19	1
20	2
21	4
22	0
23	1
24	3
25	0
26	1
27	2
28	4
29	5
30	6
31	8
32	0
33	1
34	0
35	1
36	2
37	3
38	4
39	6
40	8
41	9
42	0
43	1
44	0
45	1
46	2
47	4
48	7
49	8
50	0
51	1
52	3
53	5
54	6
55	9
56	10
57	12
58	0
59	1
60	2
61	4
62	8
63	0
64	1
65	0
66	1
67	2
68	3
69	4
70	6
71	8
72	9
73	10
74	12
75	14
76	16
77	0
78	1
79	0
80	1
81	2
82	4
83	5
84	8
85	10
86	12
87	16

[0, 0, 1, 0, 1, 0, 1, 2, 0, 1, 0, 1, 2, 3, 4, 0, 1, 0, 1, 2, 4, 0, 1, 3, 0, 1, 2, 4, 5, 6, 8, 0, 1, 0, 1, 2, 3, 4, 6, 8, 9, 0, 1, 0, 1, 2, 4, 7, 8, 0, 1, 3, 5, 6, 9, 10, 12, 0, 1, 2, 4, 8, 0, 1, 0, 1, 2, 3, 4, 6, 8, 9, 10, 12, 14, 16, 0, 1, 0, 1, 2, 4, 5, 8, 10, 12, 16]

cp's OEIS Frontend

A381801 Irregular triangle read by rows: row n lists the residues r mod n of numbers k such that rad(k) | n, where rad = A007947.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	0
5	1
6	0
7	1
8	2
9	0
10	1
11	0
12	1
13	2
14	3
15	4
16	0
17	1
18	0
19	1
20	2
21	4
22	0
23	1
24	3
25	0
26	1
27	2
28	4
29	5
30	6
31	8
32	0
33	1
34	0
35	1
36	2
37	3
38	4
39	6
40	8
41	9
42	0
43	1
44	0
45	1
46	2
47	4
48	7
49	8
50	0
51	1
52	3
53	5
54	6
55	9
56	10
57	12
58	0
59	1
60	2
61	4
62	8
63	0
64	1
65	0
66	1
67	2
68	3
69	4
70	6
71	8
72	9
73	10
74	12
75	14
76	16
77	0
78	1
79	0
80	1
81	2
82	4
83	5
84	8
85	10
86	12
87	16

n	a(n)
1	0
2	0
3	1
4	0
5	1
6	0
7	1
8	2
9	0
10	1
11	0
12	1
13	2
14	3
15	4
16	0
17	1
18	0
19	1
20	2
21	4
22	0
23	1
24	3
25	0
26	1
27	2
28	4
29	5
30	6
31	8
32	0
33	1
34	0
35	1
36	2
37	3
38	4
39	6
40	8
41	9
42	0
43	1
44	0
45	1
46	2
47	4
48	7
49	8
50	0
51	1
52	3
53	5
54	6
55	9
56	10
57	12
58	0
59	1
60	2
61	4
62	8
63	0
64	1
65	0
66	1
67	2
68	3
69	4
70	6
71	8
72	9
73	10
74	12
75	14
76	16
77	0
78	1
79	0
80	1
81	2
82	4
83	5
84	8
85	10
86	12
87	16

n	a(n)
1	0
2	0
3	1
4	0
5	1
6	0
7	1
8	2
9	0
10	1
11	0
12	1
13	2
14	3
15	4
16	0
17	1
18	0
19	1
20	2
21	4
22	0
23	1
24	3
25	0
26	1
27	2
28	4
29	5
30	6
31	8
32	0
33	1
34	0
35	1
36	2
37	3
38	4
39	6
40	8
41	9
42	0
43	1
44	0
45	1
46	2
47	4
48	7
49	8
50	0
51	1
52	3
53	5
54	6
55	9
56	10
57	12
58	0
59	1
60	2
61	4
62	8
63	0
64	1
65	0
66	1
67	2
68	3
69	4
70	6
71	8
72	9
73	10
74	12
75	14
76	16
77	0
78	1
79	0
80	1
81	2
82	4
83	5
84	8
85	10
86	12
87	16