A215069 - cp's OEIS frontend

A215069 Natural numbers that when squared can be expressed as sums of a positive square number and a positive triangular number.

n	a(n)
1	2
2	4
3	5
4	7
5	8
6	9
7	10
8	11
9	13
10	14
11	16
12	17
13	19
14	20
15	22
16	23
17	24
18	25
19	26
20	27
21	28
22	29
23	30
24	31
25	32
26	34
27	35
28	37
29	38
30	39
31	40
32	41
33	42
34	43
35	44
36	45
37	46
38	47
39	49
40	50
41	52
42	53
43	54
44	55
45	56
46	57
47	58
48	59
49	60
50	61
51	62
52	63
53	64
54	65
55	67
56	68
57	69
58	70
59	71
60	72
61	73
62	74
63	75
64	76
65	77
66	79
67	80
68	82
69	83
70	84
71	85

[2, 4, 5, 7, 8, 9, 10, 11, 13, 14, 16, 17, 19, 20, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 79, 80, 82, 83, 84, 85]

cp's OEIS Frontend

A215069 Natural numbers that when squared can be expressed as sums of a positive square number and a positive triangular number.

Table of values

List of values

n	a(n)
1	2
2	4
3	5
4	7
5	8
6	9
7	10
8	11
9	13
10	14
11	16
12	17
13	19
14	20
15	22
16	23
17	24
18	25
19	26
20	27
21	28
22	29
23	30
24	31
25	32
26	34
27	35
28	37
29	38
30	39
31	40
32	41
33	42
34	43
35	44
36	45
37	46
38	47
39	49
40	50
41	52
42	53
43	54
44	55
45	56
46	57
47	58
48	59
49	60
50	61
51	62
52	63
53	64
54	65
55	67
56	68
57	69
58	70
59	71
60	72
61	73
62	74
63	75
64	76
65	77
66	79
67	80
68	82
69	83
70	84
71	85

n	a(n)
1	2
2	4
3	5
4	7
5	8
6	9
7	10
8	11
9	13
10	14
11	16
12	17
13	19
14	20
15	22
16	23
17	24
18	25
19	26
20	27
21	28
22	29
23	30
24	31
25	32
26	34
27	35
28	37
29	38
30	39
31	40
32	41
33	42
34	43
35	44
36	45
37	46
38	47
39	49
40	50
41	52
42	53
43	54
44	55
45	56
46	57
47	58
48	59
49	60
50	61
51	62
52	63
53	64
54	65
55	67
56	68
57	69
58	70
59	71
60	72
61	73
62	74
63	75
64	76
65	77
66	79
67	80
68	82
69	83
70	84
71	85

n	a(n)
1	2
2	4
3	5
4	7
5	8
6	9
7	10
8	11
9	13
10	14
11	16
12	17
13	19
14	20
15	22
16	23
17	24
18	25
19	26
20	27
21	28
22	29
23	30
24	31
25	32
26	34
27	35
28	37
29	38
30	39
31	40
32	41
33	42
34	43
35	44
36	45
37	46
38	47
39	49
40	50
41	52
42	53
43	54
44	55
45	56
46	57
47	58
48	59
49	60
50	61
51	62
52	63
53	64
54	65
55	67
56	68
57	69
58	70
59	71
60	72
61	73
62	74
63	75
64	76
65	77
66	79
67	80
68	82
69	83
70	84
71	85