A330385 - cp's OEIS frontend

A330385 Add the odd terms and subtract the even ones, the result must always be a square. This is the lexicographically earliest sequence of distinct positive integers with this property.

n	a(n)
1	1
2	3
3	4
4	9
5	7
6	12
7	5
8	8
9	15
10	16
11	25
12	11
13	13
14	24
15	39
16	17
17	19
18	21
19	23
20	44
21	36
22	28
23	20
24	33
25	40
26	27
27	32
28	45
29	48
30	35
31	85
32	72
33	51
34	64
35	133
36	87
37	60
38	29
39	31
40	105
41	123
42	84
43	41
44	43
45	141
46	96
47	47
48	49
49	159
50	57
51	59
52	61
53	63
54	65
55	67
56	69
57	71
58	73
59	75
60	77
61	79
62	81
63	83
64	164
65	156

[1, 3, 4, 9, 7, 12, 5, 8, 15, 16, 25, 11, 13, 24, 39, 17, 19, 21, 23, 44, 36, 28, 20, 33, 40, 27, 32, 45, 48, 35, 85, 72, 51, 64, 133, 87, 60, 29, 31, 105, 123, 84, 41, 43, 141, 96, 47, 49, 159, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 164, 156]

cp's OEIS Frontend

A330385 Add the odd terms and subtract the even ones, the result must always be a square. This is the lexicographically earliest sequence of distinct positive integers with this property.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	9
5	7
6	12
7	5
8	8
9	15
10	16
11	25
12	11
13	13
14	24
15	39
16	17
17	19
18	21
19	23
20	44
21	36
22	28
23	20
24	33
25	40
26	27
27	32
28	45
29	48
30	35
31	85
32	72
33	51
34	64
35	133
36	87
37	60
38	29
39	31
40	105
41	123
42	84
43	41
44	43
45	141
46	96
47	47
48	49
49	159
50	57
51	59
52	61
53	63
54	65
55	67
56	69
57	71
58	73
59	75
60	77
61	79
62	81
63	83
64	164
65	156

n	a(n)
1	1
2	3
3	4
4	9
5	7
6	12
7	5
8	8
9	15
10	16
11	25
12	11
13	13
14	24
15	39
16	17
17	19
18	21
19	23
20	44
21	36
22	28
23	20
24	33
25	40
26	27
27	32
28	45
29	48
30	35
31	85
32	72
33	51
34	64
35	133
36	87
37	60
38	29
39	31
40	105
41	123
42	84
43	41
44	43
45	141
46	96
47	47
48	49
49	159
50	57
51	59
52	61
53	63
54	65
55	67
56	69
57	71
58	73
59	75
60	77
61	79
62	81
63	83
64	164
65	156

n	a(n)
1	1
2	3
3	4
4	9
5	7
6	12
7	5
8	8
9	15
10	16
11	25
12	11
13	13
14	24
15	39
16	17
17	19
18	21
19	23
20	44
21	36
22	28
23	20
24	33
25	40
26	27
27	32
28	45
29	48
30	35
31	85
32	72
33	51
34	64
35	133
36	87
37	60
38	29
39	31
40	105
41	123
42	84
43	41
44	43
45	141
46	96
47	47
48	49
49	159
50	57
51	59
52	61
53	63
54	65
55	67
56	69
57	71
58	73
59	75
60	77
61	79
62	81
63	83
64	164
65	156