A230044 - cp's OEIS frontend

A230044 Nonnegative numbers k such that k plus a perfect square is a triangular number.

n	a(n)
1	0
2	1
3	2
4	3
5	5
6	6
7	9
8	10
9	11
10	12
11	14
12	15
13	17
14	19
15	20
16	21
17	24
18	27
19	28
20	29
21	30
22	32
23	35
24	36
25	39
26	41
27	42
28	44
29	45
30	46
31	50
32	51
33	53
34	54
35	55
36	56
37	57
38	62
39	65
40	66
41	69
42	71
43	72
44	74
45	75
46	77
47	78
48	80
49	82
50	84
51	87
52	89
53	90
54	91
55	95
56	96
57	100
58	101
59	104
60	105
61	107
62	109
63	110
64	111
65	116
66	117
67	119
68	120
69	122
70	126
71	127
72	128

[0, 1, 2, 3, 5, 6, 9, 10, 11, 12, 14, 15, 17, 19, 20, 21, 24, 27, 28, 29, 30, 32, 35, 36, 39, 41, 42, 44, 45, 46, 50, 51, 53, 54, 55, 56, 57, 62, 65, 66, 69, 71, 72, 74, 75, 77, 78, 80, 82, 84, 87, 89, 90, 91, 95, 96, 100, 101, 104, 105, 107, 109, 110, 111, 116, 117, 119, 120, 122, 126, 127, 128]

cp's OEIS Frontend

A230044 Nonnegative numbers k such that k plus a perfect square is a triangular number.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	3
5	5
6	6
7	9
8	10
9	11
10	12
11	14
12	15
13	17
14	19
15	20
16	21
17	24
18	27
19	28
20	29
21	30
22	32
23	35
24	36
25	39
26	41
27	42
28	44
29	45
30	46
31	50
32	51
33	53
34	54
35	55
36	56
37	57
38	62
39	65
40	66
41	69
42	71
43	72
44	74
45	75
46	77
47	78
48	80
49	82
50	84
51	87
52	89
53	90
54	91
55	95
56	96
57	100
58	101
59	104
60	105
61	107
62	109
63	110
64	111
65	116
66	117
67	119
68	120
69	122
70	126
71	127
72	128

n	a(n)
1	0
2	1
3	2
4	3
5	5
6	6
7	9
8	10
9	11
10	12
11	14
12	15
13	17
14	19
15	20
16	21
17	24
18	27
19	28
20	29
21	30
22	32
23	35
24	36
25	39
26	41
27	42
28	44
29	45
30	46
31	50
32	51
33	53
34	54
35	55
36	56
37	57
38	62
39	65
40	66
41	69
42	71
43	72
44	74
45	75
46	77
47	78
48	80
49	82
50	84
51	87
52	89
53	90
54	91
55	95
56	96
57	100
58	101
59	104
60	105
61	107
62	109
63	110
64	111
65	116
66	117
67	119
68	120
69	122
70	126
71	127
72	128

n	a(n)
1	0
2	1
3	2
4	3
5	5
6	6
7	9
8	10
9	11
10	12
11	14
12	15
13	17
14	19
15	20
16	21
17	24
18	27
19	28
20	29
21	30
22	32
23	35
24	36
25	39
26	41
27	42
28	44
29	45
30	46
31	50
32	51
33	53
34	54
35	55
36	56
37	57
38	62
39	65
40	66
41	69
42	71
43	72
44	74
45	75
46	77
47	78
48	80
49	82
50	84
51	87
52	89
53	90
54	91
55	95
56	96
57	100
58	101
59	104
60	105
61	107
62	109
63	110
64	111
65	116
66	117
67	119
68	120
69	122
70	126
71	127
72	128