A286237 - cp's OEIS frontend

A286237 Triangular table: T(n,k) = 0 if k does not divide n, otherwise T(n,k) = P(phi(k), n/k), where P is sequence A000027 used as a pairing function N x N -> N, and phi is Euler totient function, A000010. Table is read by rows as T(1,1), T(2,1), T(2,2), etc.

n	a(n)
1	1
2	2
3	1
4	4
5	0
6	3
7	7
8	2
9	0
10	3
11	11
12	0
13	0
14	0
15	10
16	16
17	4
18	5
19	0
20	0
21	3
22	22
23	0
24	0
25	0
26	0
27	0
28	21
29	29
30	7
31	0
32	5
33	0
34	0
35	0
36	10
37	37
38	0
39	8
40	0
41	0
42	0
43	0
44	0
45	21
46	46
47	11
48	0
49	0
50	14
51	0
52	0
53	0
54	0
55	10
56	56
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	55
67	67
68	16
69	12
70	8
71	0
72	5
73	0
74	0
75	0
76	0
77	0
78	10
79	79
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0
88	0
89	0
90	0
91	78
92	92
93	22
94	0
95	0
96	0
97	0
98	27
99	0
100	0
101	0
102	0
103	0
104	0
105	21
106	106
107	0
108	17
109	0
110	19
111	0
112	0
113	0
114	0
115	0
116	0
117	0
118	0
119	0
120	36

[1, 2, 1, 4, 0, 3, 7, 2, 0, 3, 11, 0, 0, 0, 10, 16, 4, 5, 0, 0, 3, 22, 0, 0, 0, 0, 0, 21, 29, 7, 0, 5, 0, 0, 0, 10, 37, 0, 8, 0, 0, 0, 0, 0, 21, 46, 11, 0, 0, 14, 0, 0, 0, 0, 10, 56, 0, 0, 0, 0, 0, 0, 0, 0, 0, 55, 67, 16, 12, 8, 0, 5, 0, 0, 0, 0, 0, 10, 79, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 78, 92, 22, 0, 0, 0, 0, 27, 0, 0, 0, 0, 0, 0, 21, 106, 0, 17, 0, 19, 0, 0, 0, 0, 0, 0, 0, 0, 0, 36]

cp's OEIS Frontend

A286237 Triangular table: T(n,k) = 0 if k does not divide n, otherwise T(n,k) = P(phi(k), n/k), where P is sequence A000027 used as a pairing function N x N -> N, and phi is Euler totient function, A000010. Table is read by rows as T(1,1), T(2,1), T(2,2), etc.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	4
5	0
6	3
7	7
8	2
9	0
10	3
11	11
12	0
13	0
14	0
15	10
16	16
17	4
18	5
19	0
20	0
21	3
22	22
23	0
24	0
25	0
26	0
27	0
28	21
29	29
30	7
31	0
32	5
33	0
34	0
35	0
36	10
37	37
38	0
39	8
40	0
41	0
42	0
43	0
44	0
45	21
46	46
47	11
48	0
49	0
50	14
51	0
52	0
53	0
54	0
55	10
56	56
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	55
67	67
68	16
69	12
70	8
71	0
72	5
73	0
74	0
75	0
76	0
77	0
78	10
79	79
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0
88	0
89	0
90	0
91	78
92	92
93	22
94	0
95	0
96	0
97	0
98	27
99	0
100	0
101	0
102	0
103	0
104	0
105	21
106	106
107	0
108	17
109	0
110	19
111	0
112	0
113	0
114	0
115	0
116	0
117	0
118	0
119	0
120	36

n	a(n)
1	1
2	2
3	1
4	4
5	0
6	3
7	7
8	2
9	0
10	3
11	11
12	0
13	0
14	0
15	10
16	16
17	4
18	5
19	0
20	0
21	3
22	22
23	0
24	0
25	0
26	0
27	0
28	21
29	29
30	7
31	0
32	5
33	0
34	0
35	0
36	10
37	37
38	0
39	8
40	0
41	0
42	0
43	0
44	0
45	21
46	46
47	11
48	0
49	0
50	14
51	0
52	0
53	0
54	0
55	10
56	56
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	55
67	67
68	16
69	12
70	8
71	0
72	5
73	0
74	0
75	0
76	0
77	0
78	10
79	79
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0
88	0
89	0
90	0
91	78
92	92
93	22
94	0
95	0
96	0
97	0
98	27
99	0
100	0
101	0
102	0
103	0
104	0
105	21
106	106
107	0
108	17
109	0
110	19
111	0
112	0
113	0
114	0
115	0
116	0
117	0
118	0
119	0
120	36

n	a(n)
1	1
2	2
3	1
4	4
5	0
6	3
7	7
8	2
9	0
10	3
11	11
12	0
13	0
14	0
15	10
16	16
17	4
18	5
19	0
20	0
21	3
22	22
23	0
24	0
25	0
26	0
27	0
28	21
29	29
30	7
31	0
32	5
33	0
34	0
35	0
36	10
37	37
38	0
39	8
40	0
41	0
42	0
43	0
44	0
45	21
46	46
47	11
48	0
49	0
50	14
51	0
52	0
53	0
54	0
55	10
56	56
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	55
67	67
68	16
69	12
70	8
71	0
72	5
73	0
74	0
75	0
76	0
77	0
78	10
79	79
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0
88	0
89	0
90	0
91	78
92	92
93	22
94	0
95	0
96	0
97	0
98	27
99	0
100	0
101	0
102	0
103	0
104	0
105	21
106	106
107	0
108	17
109	0
110	19
111	0
112	0
113	0
114	0
115	0
116	0
117	0
118	0
119	0
120	36