A226138 - cp's OEIS frontend

A226138 Numbers k such that k^2 = (2i+1)^2 + (2j+1)^2 - 1, where i <= j and i,j > 0, retaining multiples of same k obtained from different i, j combinations.

n	a(n)
1	7
2	13
3	17
4	21
5	23
6	27
7	31
8	33
9	37
10	41
11	43
12	43
13	47
14	47
15	47
16	53
17	55
18	57
19	57
20	57
21	63
22	67
23	73
24	73
25	73
26	75
27	77
28	81
29	83
30	83
31	83
32	87
33	89
34	91
35	93
36	93
37	97
38	99
39	99
40	103
41	105
42	107
43	107
44	109
45	111
46	113
47	115
48	117
49	119
50	123
51	123
52	123
53	125
54	127
55	129
56	133
57	133
58	133
59	135
60	137
61	143
62	143
63	147
64	149

[7, 13, 17, 21, 23, 27, 31, 33, 37, 41, 43, 43, 47, 47, 47, 53, 55, 57, 57, 57, 63, 67, 73, 73, 73, 75, 77, 81, 83, 83, 83, 87, 89, 91, 93, 93, 97, 99, 99, 103, 105, 107, 107, 109, 111, 113, 115, 117, 119, 123, 123, 123, 125, 127, 129, 133, 133, 133, 135, 137, 143, 143, 147, 149]

cp's OEIS Frontend

A226138 Numbers k such that k^2 = (2i+1)^2 + (2j+1)^2 - 1, where i <= j and i,j > 0, retaining multiples of same k obtained from different i, j combinations.

Table of values

List of values

n	a(n)
1	7
2	13
3	17
4	21
5	23
6	27
7	31
8	33
9	37
10	41
11	43
12	43
13	47
14	47
15	47
16	53
17	55
18	57
19	57
20	57
21	63
22	67
23	73
24	73
25	73
26	75
27	77
28	81
29	83
30	83
31	83
32	87
33	89
34	91
35	93
36	93
37	97
38	99
39	99
40	103
41	105
42	107
43	107
44	109
45	111
46	113
47	115
48	117
49	119
50	123
51	123
52	123
53	125
54	127
55	129
56	133
57	133
58	133
59	135
60	137
61	143
62	143
63	147
64	149

n	a(n)
1	7
2	13
3	17
4	21
5	23
6	27
7	31
8	33
9	37
10	41
11	43
12	43
13	47
14	47
15	47
16	53
17	55
18	57
19	57
20	57
21	63
22	67
23	73
24	73
25	73
26	75
27	77
28	81
29	83
30	83
31	83
32	87
33	89
34	91
35	93
36	93
37	97
38	99
39	99
40	103
41	105
42	107
43	107
44	109
45	111
46	113
47	115
48	117
49	119
50	123
51	123
52	123
53	125
54	127
55	129
56	133
57	133
58	133
59	135
60	137
61	143
62	143
63	147
64	149

n	a(n)
1	7
2	13
3	17
4	21
5	23
6	27
7	31
8	33
9	37
10	41
11	43
12	43
13	47
14	47
15	47
16	53
17	55
18	57
19	57
20	57
21	63
22	67
23	73
24	73
25	73
26	75
27	77
28	81
29	83
30	83
31	83
32	87
33	89
34	91
35	93
36	93
37	97
38	99
39	99
40	103
41	105
42	107
43	107
44	109
45	111
46	113
47	115
48	117
49	119
50	123
51	123
52	123
53	125
54	127
55	129
56	133
57	133
58	133
59	135
60	137
61	143
62	143
63	147
64	149