A347681 - cp's OEIS frontend

A347681 Triangle read by rows: T(n,k) (1<=k<=n) = f(prime(n),prime(k)), where f(x,y) = xred_inv(x,y) + yred_inv(y,x) if gcd(x,y)=1, or 0 if gcd(x,y)>1, and red_inv is defined in the comments.

n	a(n)
1	0
2	5
3	0
4	9
5	11
6	0
7	13
8	13
9	29
10	0
11	21
12	23
13	21
14	43
15	0
16	25
17	25
18	51
19	27
20	131
21	0
22	33
23	35
24	69
25	69
26	67
27	103
28	0
29	37
30	37
31	39
32	113
33	153
34	77
35	305
36	0
37	45
38	47
39	91
40	139
41	45
42	183
43	137
44	229
45	0
46	57
47	59
48	59
49	57
50	175
51	233
52	407
53	115
54	231
55	0
56	61
57	61
58	61
59	125
60	309
61	311
62	373
63	495
64	185
65	869
66	0
67	73
68	73
69	149
70	223
71	221
72	443
73	443
74	75
75	369
76	813
77	371
78	0

[0, 5, 0, 9, 11, 0, 13, 13, 29, 0, 21, 23, 21, 43, 0, 25, 25, 51, 27, 131, 0, 33, 35, 69, 69, 67, 103, 0, 37, 37, 39, 113, 153, 77, 305, 0, 45, 47, 91, 139, 45, 183, 137, 229, 0, 57, 59, 59, 57, 175, 233, 407, 115, 231, 0, 61, 61, 61, 125, 309, 311, 373, 495, 185, 869, 0, 73, 73, 149, 223, 221, 443, 443, 75, 369, 813, 371, 0]

cp's OEIS Frontend

A347681 Triangle read by rows: T(n,k) (1<=k<=n) = f(prime(n),prime(k)), where f(x,y) = xred_inv(x,y) + yred_inv(y,x) if gcd(x,y)=1, or 0 if gcd(x,y)>1, and red_inv is defined in the comments.

Table of values

List of values

n	a(n)
1	0
2	5
3	0
4	9
5	11
6	0
7	13
8	13
9	29
10	0
11	21
12	23
13	21
14	43
15	0
16	25
17	25
18	51
19	27
20	131
21	0
22	33
23	35
24	69
25	69
26	67
27	103
28	0
29	37
30	37
31	39
32	113
33	153
34	77
35	305
36	0
37	45
38	47
39	91
40	139
41	45
42	183
43	137
44	229
45	0
46	57
47	59
48	59
49	57
50	175
51	233
52	407
53	115
54	231
55	0
56	61
57	61
58	61
59	125
60	309
61	311
62	373
63	495
64	185
65	869
66	0
67	73
68	73
69	149
70	223
71	221
72	443
73	443
74	75
75	369
76	813
77	371
78	0

n	a(n)
1	0
2	5
3	0
4	9
5	11
6	0
7	13
8	13
9	29
10	0
11	21
12	23
13	21
14	43
15	0
16	25
17	25
18	51
19	27
20	131
21	0
22	33
23	35
24	69
25	69
26	67
27	103
28	0
29	37
30	37
31	39
32	113
33	153
34	77
35	305
36	0
37	45
38	47
39	91
40	139
41	45
42	183
43	137
44	229
45	0
46	57
47	59
48	59
49	57
50	175
51	233
52	407
53	115
54	231
55	0
56	61
57	61
58	61
59	125
60	309
61	311
62	373
63	495
64	185
65	869
66	0
67	73
68	73
69	149
70	223
71	221
72	443
73	443
74	75
75	369
76	813
77	371
78	0

cp's OEIS Frontend

A347681 Triangle read by rows: T(n,k) (1<=k<=n) = f(prime(n),prime(k)), where f(x,y) = x*red_inv(x,y) + y*red_inv(y,x) if gcd(x,y)=1, or 0 if gcd(x,y)>1, and red_inv is defined in the comments.

Table of values

List of values

A347681 Triangle read by rows: T(n,k) (1<=k<=n) = f(prime(n),prime(k)), where f(x,y) = xred_inv(x,y) + yred_inv(y,x) if gcd(x,y)=1, or 0 if gcd(x,y)>1, and red_inv is defined in the comments.

n	a(n)
1	0
2	5
3	0
4	9
5	11
6	0
7	13
8	13
9	29
10	0
11	21
12	23
13	21
14	43
15	0
16	25
17	25
18	51
19	27
20	131
21	0
22	33
23	35
24	69
25	69
26	67
27	103
28	0
29	37
30	37
31	39
32	113
33	153
34	77
35	305
36	0
37	45
38	47
39	91
40	139
41	45
42	183
43	137
44	229
45	0
46	57
47	59
48	59
49	57
50	175
51	233
52	407
53	115
54	231
55	0
56	61
57	61
58	61
59	125
60	309
61	311
62	373
63	495
64	185
65	869
66	0
67	73
68	73
69	149
70	223
71	221
72	443
73	443
74	75
75	369
76	813
77	371
78	0