A336710 - cp's OEIS frontend

A336710 Square array read by antidiagonals: A(n,k) is the number of ordered solutions (x_1, x_2, ..., x_n) to equation phi(Product_{i=1..n} x_i) = k * Sum_{i=1..n} phi(x_i), or -1 if there are infinitely many solutions, n >= 1, k >= 1.

n	a(n)
1	-1
2	0
3	3
4	0
5	9
6	15
7	0
8	35
9	39
10	118
11	0
12	33
13	31
14	463
15	90
16	0
17	17
18	138
19	558
20	200
21	435
22	0
23	63
24	57
25	1080
26	580
27	1580
28	644
29	0
30	15
31	198
32	750
33	1375
34	2400
35	1820
36	294
37	0
38	91
39	87
40	1200
41	570
42	4695
43	3535
44	3024
45	792
46	0
47	79
48	411
49	528
50	2490
51	1680
52	8386
53	12292
54	5256
55	3285
56	0
57	67
58	183
59	2584
60	685
61	7710
62	2555
63	15568
64	14364
65	16605
66	1595
67	0
68	39
69	294
70	1346
71	6565
72	2790
73	21070
74	6160
75	42030
76	28305
77	21780
78	15708
79	0

[-1, 0, 3, 0, 9, 15, 0, 35, 39, 118, 0, 33, 31, 463, 90, 0, 17, 138, 558, 200, 435, 0, 63, 57, 1080, 580, 1580, 644, 0, 15, 198, 750, 1375, 2400, 1820, 294, 0, 91, 87, 1200, 570, 4695, 3535, 3024, 792, 0, 79, 411, 528, 2490, 1680, 8386, 12292, 5256, 3285, 0, 67, 183, 2584, 685, 7710, 2555, 15568, 14364, 16605, 1595, 0, 39, 294, 1346, 6565, 2790, 21070, 6160, 42030, 28305, 21780, 15708, 0]

cp's OEIS Frontend

A336710 Square array read by antidiagonals: A(n,k) is the number of ordered solutions (x_1, x_2, ..., x_n) to equation phi(Product_{i=1..n} x_i) = k * Sum_{i=1..n} phi(x_i), or -1 if there are infinitely many solutions, n >= 1, k >= 1.

Table of values

List of values