A050796 - cp's OEIS frontend

A050796 Numbers n such that n^2 + 1 is expressible as the sum of two nonzero squares in at least one way (the trivial solution n^2 + 1 = n^2 + 1^2 is not counted).

n	a(n)
1	1
2	7
3	8
4	12
5	13
6	17
7	18
8	21
9	22
10	23
11	27
12	28
13	30
14	31
15	32
16	33
17	34
18	37
19	38
20	41
21	42
22	43
23	44
24	46
25	47
26	48
27	50
28	52
29	53
30	55
31	57
32	58
33	60
34	62
35	63
36	64
37	67
38	68
39	70
40	72
41	73
42	75
43	76
44	77
45	78
46	80
47	81
48	82
49	83
50	86
51	87
52	88
53	89
54	91
55	92
56	93
57	96
58	97
59	98
60	99
61	100
62	102
63	103
64	104
65	105
66	106
67	107

[1, 7, 8, 12, 13, 17, 18, 21, 22, 23, 27, 28, 30, 31, 32, 33, 34, 37, 38, 41, 42, 43, 44, 46, 47, 48, 50, 52, 53, 55, 57, 58, 60, 62, 63, 64, 67, 68, 70, 72, 73, 75, 76, 77, 78, 80, 81, 82, 83, 86, 87, 88, 89, 91, 92, 93, 96, 97, 98, 99, 100, 102, 103, 104, 105, 106, 107]

cp's OEIS Frontend

A050796 Numbers n such that n^2 + 1 is expressible as the sum of two nonzero squares in at least one way (the trivial solution n^2 + 1 = n^2 + 1^2 is not counted).

Table of values

List of values

n	a(n)
1	1
2	7
3	8
4	12
5	13
6	17
7	18
8	21
9	22
10	23
11	27
12	28
13	30
14	31
15	32
16	33
17	34
18	37
19	38
20	41
21	42
22	43
23	44
24	46
25	47
26	48
27	50
28	52
29	53
30	55
31	57
32	58
33	60
34	62
35	63
36	64
37	67
38	68
39	70
40	72
41	73
42	75
43	76
44	77
45	78
46	80
47	81
48	82
49	83
50	86
51	87
52	88
53	89
54	91
55	92
56	93
57	96
58	97
59	98
60	99
61	100
62	102
63	103
64	104
65	105
66	106
67	107

n	a(n)
1	1
2	7
3	8
4	12
5	13
6	17
7	18
8	21
9	22
10	23
11	27
12	28
13	30
14	31
15	32
16	33
17	34
18	37
19	38
20	41
21	42
22	43
23	44
24	46
25	47
26	48
27	50
28	52
29	53
30	55
31	57
32	58
33	60
34	62
35	63
36	64
37	67
38	68
39	70
40	72
41	73
42	75
43	76
44	77
45	78
46	80
47	81
48	82
49	83
50	86
51	87
52	88
53	89
54	91
55	92
56	93
57	96
58	97
59	98
60	99
61	100
62	102
63	103
64	104
65	105
66	106
67	107

n	a(n)
1	1
2	7
3	8
4	12
5	13
6	17
7	18
8	21
9	22
10	23
11	27
12	28
13	30
14	31
15	32
16	33
17	34
18	37
19	38
20	41
21	42
22	43
23	44
24	46
25	47
26	48
27	50
28	52
29	53
30	55
31	57
32	58
33	60
34	62
35	63
36	64
37	67
38	68
39	70
40	72
41	73
42	75
43	76
44	77
45	78
46	80
47	81
48	82
49	83
50	86
51	87
52	88
53	89
54	91
55	92
56	93
57	96
58	97
59	98
60	99
61	100
62	102
63	103
64	104
65	105
66	106
67	107