A264827 - cp's OEIS frontend

A264827 (a,b,c) in lexicographic order such that a^2 + b^2 + a*b - c^2 = 0 with a < b < c and gcd(a, b) = 1.

n	a(n)
1	3
2	5
3	7
4	5
5	16
6	19
7	7
8	8
9	13
10	7
11	33
12	37
13	9
14	56
15	61
16	11
17	24
18	31
19	11
20	85
21	91
22	13
23	35
24	43
25	13
26	120
27	127
28	15
29	161
30	169
31	16
32	39
33	49
34	17
35	63
36	73
37	17
38	208
39	217
40	19
41	80
42	91
43	19
44	261
45	271
46	21
47	320
48	331
49	23
50	120
51	133
52	23
53	385
54	397
55	24
56	95
57	109
58	25
59	143
60	157

[3, 5, 7, 5, 16, 19, 7, 8, 13, 7, 33, 37, 9, 56, 61, 11, 24, 31, 11, 85, 91, 13, 35, 43, 13, 120, 127, 15, 161, 169, 16, 39, 49, 17, 63, 73, 17, 208, 217, 19, 80, 91, 19, 261, 271, 21, 320, 331, 23, 120, 133, 23, 385, 397, 24, 95, 109, 25, 143, 157]

cp's OEIS Frontend

A264827 (a,b,c) in lexicographic order such that a^2 + b^2 + a*b - c^2 = 0 with a < b < c and gcd(a, b) = 1.

Table of values

List of values

n	a(n)
1	3
2	5
3	7
4	5
5	16
6	19
7	7
8	8
9	13
10	7
11	33
12	37
13	9
14	56
15	61
16	11
17	24
18	31
19	11
20	85
21	91
22	13
23	35
24	43
25	13
26	120
27	127
28	15
29	161
30	169
31	16
32	39
33	49
34	17
35	63
36	73
37	17
38	208
39	217
40	19
41	80
42	91
43	19
44	261
45	271
46	21
47	320
48	331
49	23
50	120
51	133
52	23
53	385
54	397
55	24
56	95
57	109
58	25
59	143
60	157

n	a(n)
1	3
2	5
3	7
4	5
5	16
6	19
7	7
8	8
9	13
10	7
11	33
12	37
13	9
14	56
15	61
16	11
17	24
18	31
19	11
20	85
21	91
22	13
23	35
24	43
25	13
26	120
27	127
28	15
29	161
30	169
31	16
32	39
33	49
34	17
35	63
36	73
37	17
38	208
39	217
40	19
41	80
42	91
43	19
44	261
45	271
46	21
47	320
48	331
49	23
50	120
51	133
52	23
53	385
54	397
55	24
56	95
57	109
58	25
59	143
60	157

n	a(n)
1	3
2	5
3	7
4	5
5	16
6	19
7	7
8	8
9	13
10	7
11	33
12	37
13	9
14	56
15	61
16	11
17	24
18	31
19	11
20	85
21	91
22	13
23	35
24	43
25	13
26	120
27	127
28	15
29	161
30	169
31	16
32	39
33	49
34	17
35	63
36	73
37	17
38	208
39	217
40	19
41	80
42	91
43	19
44	261
45	271
46	21
47	320
48	331
49	23
50	120
51	133
52	23
53	385
54	397
55	24
56	95
57	109
58	25
59	143
60	157