A368197 - cp's OEIS frontend

A368197 Triangle read by rows: T(n,k) = Sum_{z=1..n} Sum_{y=1..n} Sum_{x=1..n} [GCD(f(x,y,z), n) = k], where f(x,y,z) = x^2 + y^2 - z^2.

n	a(n)
1	1
2	4
3	4
4	18
5	0
6	9
7	32
8	8
9	0
10	24
11	100
12	0
13	0
14	0
15	25
16	72
17	72
18	36
19	0
20	0
21	36
22	294
23	0
24	0
25	0
26	0
27	0
28	49
29	256
30	64
31	0
32	96
33	0
34	0
35	0
36	96
37	486
38	0
39	144
40	0
41	0
42	0
43	0
44	0
45	99
46	400
47	400
48	0
49	0
50	100
51	0
52	0
53	0
54	0
55	100
56	1210
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	121

[1, 4, 4, 18, 0, 9, 32, 8, 0, 24, 100, 0, 0, 0, 25, 72, 72, 36, 0, 0, 36, 294, 0, 0, 0, 0, 0, 49, 256, 64, 0, 96, 0, 0, 0, 96, 486, 0, 144, 0, 0, 0, 0, 0, 99, 400, 400, 0, 0, 100, 0, 0, 0, 0, 100, 1210, 0, 0, 0, 0, 0, 0, 0, 0, 0, 121]

cp's OEIS Frontend

A368197 Triangle read by rows: T(n,k) = Sum_{z=1..n} Sum_{y=1..n} Sum_{x=1..n} [GCD(f(x,y,z), n) = k], where f(x,y,z) = x^2 + y^2 - z^2.

Table of values

List of values