A113793 - cp's OEIS frontend

A113793 Triangle read by rows: T(n,m) = phi(n - m + 1) * phi(m), n >= 1, m >= 1.

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	2
10	2
11	4
12	2
13	4
14	2
15	4
16	2
17	4
18	4
19	4
20	4
21	2
22	6
23	2
24	8
25	4
26	8
27	2
28	6
29	4
30	6
31	4
32	8
33	8
34	4
35	6
36	4
37	6
38	4
39	12
40	4
41	16
42	4
43	12
44	4
45	6
46	4
47	6
48	8
49	12
50	8
51	8
52	12
53	8
54	6
55	4
56	10
57	4
58	12
59	8
60	24
61	4
62	24
63	8
64	12
65	4
66	10
67	4
68	10
69	8
70	12
71	16
72	12
73	12
74	16
75	12
76	8
77	10
78	4
79	12
80	4
81	20
82	8
83	24
84	8
85	36
86	8
87	24
88	8
89	20
90	4
91	12

[1, 1, 1, 2, 1, 2, 2, 2, 2, 2, 4, 2, 4, 2, 4, 2, 4, 4, 4, 4, 2, 6, 2, 8, 4, 8, 2, 6, 4, 6, 4, 8, 8, 4, 6, 4, 6, 4, 12, 4, 16, 4, 12, 4, 6, 4, 6, 8, 12, 8, 8, 12, 8, 6, 4, 10, 4, 12, 8, 24, 4, 24, 8, 12, 4, 10, 4, 10, 8, 12, 16, 12, 12, 16, 12, 8, 10, 4, 12, 4, 20, 8, 24, 8, 36, 8, 24, 8, 20, 4, 12]

cp's OEIS Frontend

A113793 Triangle read by rows: T(n,m) = phi(n - m + 1) * phi(m), n >= 1, m >= 1.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	2
10	2
11	4
12	2
13	4
14	2
15	4
16	2
17	4
18	4
19	4
20	4
21	2
22	6
23	2
24	8
25	4
26	8
27	2
28	6
29	4
30	6
31	4
32	8
33	8
34	4
35	6
36	4
37	6
38	4
39	12
40	4
41	16
42	4
43	12
44	4
45	6
46	4
47	6
48	8
49	12
50	8
51	8
52	12
53	8
54	6
55	4
56	10
57	4
58	12
59	8
60	24
61	4
62	24
63	8
64	12
65	4
66	10
67	4
68	10
69	8
70	12
71	16
72	12
73	12
74	16
75	12
76	8
77	10
78	4
79	12
80	4
81	20
82	8
83	24
84	8
85	36
86	8
87	24
88	8
89	20
90	4
91	12

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	2
10	2
11	4
12	2
13	4
14	2
15	4
16	2
17	4
18	4
19	4
20	4
21	2
22	6
23	2
24	8
25	4
26	8
27	2
28	6
29	4
30	6
31	4
32	8
33	8
34	4
35	6
36	4
37	6
38	4
39	12
40	4
41	16
42	4
43	12
44	4
45	6
46	4
47	6
48	8
49	12
50	8
51	8
52	12
53	8
54	6
55	4
56	10
57	4
58	12
59	8
60	24
61	4
62	24
63	8
64	12
65	4
66	10
67	4
68	10
69	8
70	12
71	16
72	12
73	12
74	16
75	12
76	8
77	10
78	4
79	12
80	4
81	20
82	8
83	24
84	8
85	36
86	8
87	24
88	8
89	20
90	4
91	12

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	2
10	2
11	4
12	2
13	4
14	2
15	4
16	2
17	4
18	4
19	4
20	4
21	2
22	6
23	2
24	8
25	4
26	8
27	2
28	6
29	4
30	6
31	4
32	8
33	8
34	4
35	6
36	4
37	6
38	4
39	12
40	4
41	16
42	4
43	12
44	4
45	6
46	4
47	6
48	8
49	12
50	8
51	8
52	12
53	8
54	6
55	4
56	10
57	4
58	12
59	8
60	24
61	4
62	24
63	8
64	12
65	4
66	10
67	4
68	10
69	8
70	12
71	16
72	12
73	12
74	16
75	12
76	8
77	10
78	4
79	12
80	4
81	20
82	8
83	24
84	8
85	36
86	8
87	24
88	8
89	20
90	4
91	12