A272063 - cp's OEIS frontend

A272063 a(n) = largest k such that A004431(n) +/- k are both positive squares.

n	a(n)
1	4
2	6
3	12
4	8
5	16
6	24
7	10
8	20
9	30
10	12
11	24
12	40
13	36
14	14
15	48
16	28
17	42
18	60
19	56
20	32
21	48
22	70
23	64
24	18
25	84
26	80
27	54
28	72
29	96
30	20
31	40
32	90
33	60
34	112
35	80
36	108
37	22
38	100
39	126
40	120
41	88
42	144
43	110
44	48
45	140
46	72
47	132
48	96
49	160
50	120
51	154
52	52
53	78
54	144
55	180

[4, 6, 12, 8, 16, 24, 10, 20, 30, 12, 24, 40, 36, 14, 48, 28, 42, 60, 56, 32, 48, 70, 64, 18, 84, 80, 54, 72, 96, 20, 40, 90, 60, 112, 80, 108, 22, 100, 126, 120, 88, 144, 110, 48, 140, 72, 132, 96, 160, 120, 154, 52, 78, 144, 180]

cp's OEIS Frontend

A272063 a(n) = largest k such that A004431(n) +/- k are both positive squares.

Table of values

List of values

n	a(n)
1	4
2	6
3	12
4	8
5	16
6	24
7	10
8	20
9	30
10	12
11	24
12	40
13	36
14	14
15	48
16	28
17	42
18	60
19	56
20	32
21	48
22	70
23	64
24	18
25	84
26	80
27	54
28	72
29	96
30	20
31	40
32	90
33	60
34	112
35	80
36	108
37	22
38	100
39	126
40	120
41	88
42	144
43	110
44	48
45	140
46	72
47	132
48	96
49	160
50	120
51	154
52	52
53	78
54	144
55	180

n	a(n)
1	4
2	6
3	12
4	8
5	16
6	24
7	10
8	20
9	30
10	12
11	24
12	40
13	36
14	14
15	48
16	28
17	42
18	60
19	56
20	32
21	48
22	70
23	64
24	18
25	84
26	80
27	54
28	72
29	96
30	20
31	40
32	90
33	60
34	112
35	80
36	108
37	22
38	100
39	126
40	120
41	88
42	144
43	110
44	48
45	140
46	72
47	132
48	96
49	160
50	120
51	154
52	52
53	78
54	144
55	180

n	a(n)
1	4
2	6
3	12
4	8
5	16
6	24
7	10
8	20
9	30
10	12
11	24
12	40
13	36
14	14
15	48
16	28
17	42
18	60
19	56
20	32
21	48
22	70
23	64
24	18
25	84
26	80
27	54
28	72
29	96
30	20
31	40
32	90
33	60
34	112
35	80
36	108
37	22
38	100
39	126
40	120
41	88
42	144
43	110
44	48
45	140
46	72
47	132
48	96
49	160
50	120
51	154
52	52
53	78
54	144
55	180