A309388 - cp's OEIS frontend

A309388 Numbers y such that x(x+1) + y(y+1) = z*(z+1) does not have a solution in positive integers x, z with x <= y.

n	a(n)
1	1
2	3
3	4
4	7
5	8
6	11
7	12
8	15
9	16
10	19
11	23
12	28
13	31
14	32
15	36
16	40
17	43
18	47
19	52
20	59
21	60
22	63
23	64
24	67
25	71
26	72
27	79
28	83
29	87
30	88
31	96
32	100
33	103
34	107
35	108
36	112
37	127
38	128
39	131
40	136
41	139
42	148
43	151
44	156
45	163
46	167
47	172
48	176
49	179
50	180
51	183
52	187
53	191
54	192
55	196
56	199
57	211
58	223
59	227

[1, 3, 4, 7, 8, 11, 12, 15, 16, 19, 23, 28, 31, 32, 36, 40, 43, 47, 52, 59, 60, 63, 64, 67, 71, 72, 79, 83, 87, 88, 96, 100, 103, 107, 108, 112, 127, 128, 131, 136, 139, 148, 151, 156, 163, 167, 172, 176, 179, 180, 183, 187, 191, 192, 196, 199, 211, 223, 227]

cp's OEIS Frontend

A309388 Numbers y such that x(x+1) + y(y+1) = z*(z+1) does not have a solution in positive integers x, z with x <= y.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	7
5	8
6	11
7	12
8	15
9	16
10	19
11	23
12	28
13	31
14	32
15	36
16	40
17	43
18	47
19	52
20	59
21	60
22	63
23	64
24	67
25	71
26	72
27	79
28	83
29	87
30	88
31	96
32	100
33	103
34	107
35	108
36	112
37	127
38	128
39	131
40	136
41	139
42	148
43	151
44	156
45	163
46	167
47	172
48	176
49	179
50	180
51	183
52	187
53	191
54	192
55	196
56	199
57	211
58	223
59	227

n	a(n)
1	1
2	3
3	4
4	7
5	8
6	11
7	12
8	15
9	16
10	19
11	23
12	28
13	31
14	32
15	36
16	40
17	43
18	47
19	52
20	59
21	60
22	63
23	64
24	67
25	71
26	72
27	79
28	83
29	87
30	88
31	96
32	100
33	103
34	107
35	108
36	112
37	127
38	128
39	131
40	136
41	139
42	148
43	151
44	156
45	163
46	167
47	172
48	176
49	179
50	180
51	183
52	187
53	191
54	192
55	196
56	199
57	211
58	223
59	227

cp's OEIS Frontend

A309388 Numbers y such that x*(x+1) + y*(y+1) = z*(z+1) does not have a solution in positive integers x, z with x <= y.

Table of values

List of values

A309388 Numbers y such that x(x+1) + y(y+1) = z*(z+1) does not have a solution in positive integers x, z with x <= y.

n	a(n)
1	1
2	3
3	4
4	7
5	8
6	11
7	12
8	15
9	16
10	19
11	23
12	28
13	31
14	32
15	36
16	40
17	43
18	47
19	52
20	59
21	60
22	63
23	64
24	67
25	71
26	72
27	79
28	83
29	87
30	88
31	96
32	100
33	103
34	107
35	108
36	112
37	127
38	128
39	131
40	136
41	139
42	148
43	151
44	156
45	163
46	167
47	172
48	176
49	179
50	180
51	183
52	187
53	191
54	192
55	196
56	199
57	211
58	223
59	227