A308395 - cp's OEIS frontend

A308395 Numbers y such that x(x+1) + y(y+1) = z*(z+1) is solvable in positive integers x, z with x <= y.

n	a(n)
1	2
2	5
3	6
4	9
5	10
6	13
7	14
8	17
9	18
10	20
11	21
12	22
13	24
14	25
15	26
16	27
17	29
18	30
19	33
20	34
21	35
22	37
23	38
24	39
25	41
26	42
27	44
28	45
29	46
30	48
31	49
32	50
33	51
34	53
35	54
36	55
37	56
38	57
39	58
40	61
41	62
42	65
43	66
44	68
45	69
46	70
47	73
48	74
49	75
50	76
51	77
52	78
53	80
54	81
55	82
56	84
57	85
58	86
59	89
60	90
61	91
62	92
63	93
64	94
65	95
66	97

[2, 5, 6, 9, 10, 13, 14, 17, 18, 20, 21, 22, 24, 25, 26, 27, 29, 30, 33, 34, 35, 37, 38, 39, 41, 42, 44, 45, 46, 48, 49, 50, 51, 53, 54, 55, 56, 57, 58, 61, 62, 65, 66, 68, 69, 70, 73, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 89, 90, 91, 92, 93, 94, 95, 97]

cp's OEIS Frontend

A308395 Numbers y such that x(x+1) + y(y+1) = z*(z+1) is solvable in positive integers x, z with x <= y.

Table of values

List of values

n	a(n)
1	2
2	5
3	6
4	9
5	10
6	13
7	14
8	17
9	18
10	20
11	21
12	22
13	24
14	25
15	26
16	27
17	29
18	30
19	33
20	34
21	35
22	37
23	38
24	39
25	41
26	42
27	44
28	45
29	46
30	48
31	49
32	50
33	51
34	53
35	54
36	55
37	56
38	57
39	58
40	61
41	62
42	65
43	66
44	68
45	69
46	70
47	73
48	74
49	75
50	76
51	77
52	78
53	80
54	81
55	82
56	84
57	85
58	86
59	89
60	90
61	91
62	92
63	93
64	94
65	95
66	97

n	a(n)
1	2
2	5
3	6
4	9
5	10
6	13
7	14
8	17
9	18
10	20
11	21
12	22
13	24
14	25
15	26
16	27
17	29
18	30
19	33
20	34
21	35
22	37
23	38
24	39
25	41
26	42
27	44
28	45
29	46
30	48
31	49
32	50
33	51
34	53
35	54
36	55
37	56
38	57
39	58
40	61
41	62
42	65
43	66
44	68
45	69
46	70
47	73
48	74
49	75
50	76
51	77
52	78
53	80
54	81
55	82
56	84
57	85
58	86
59	89
60	90
61	91
62	92
63	93
64	94
65	95
66	97

cp's OEIS Frontend

A308395 Numbers y such that x*(x+1) + y*(y+1) = z*(z+1) is solvable in positive integers x, z with x <= y.

Table of values

List of values

A308395 Numbers y such that x(x+1) + y(y+1) = z*(z+1) is solvable in positive integers x, z with x <= y.

n	a(n)
1	2
2	5
3	6
4	9
5	10
6	13
7	14
8	17
9	18
10	20
11	21
12	22
13	24
14	25
15	26
16	27
17	29
18	30
19	33
20	34
21	35
22	37
23	38
24	39
25	41
26	42
27	44
28	45
29	46
30	48
31	49
32	50
33	51
34	53
35	54
36	55
37	56
38	57
39	58
40	61
41	62
42	65
43	66
44	68
45	69
46	70
47	73
48	74
49	75
50	76
51	77
52	78
53	80
54	81
55	82
56	84
57	85
58	86
59	89
60	90
61	91
62	92
63	93
64	94
65	95
66	97