A258767 - cp's OEIS frontend

A258767 With a(1) = 1, a(n) is the smallest number not already in the sequence such that a(n)^2 + a(n-1)^2 is not squarefree.

n	a(n)
1	1
2	7
3	14
4	2
5	4
6	3
7	6
8	8
9	10
10	5
11	12
12	9
13	13
14	16
15	18
16	15
17	20
18	21
19	22
20	11
21	23
22	36
23	24
24	26
25	28
26	29
27	47
28	46
29	30
30	25
31	35
32	40
33	32
34	34
35	17
36	19
37	33
38	27
39	31
40	42
41	38
42	41
43	37
44	39
45	45
46	48
47	44
48	50
49	49
50	43
51	51
52	54
53	52
54	56
55	58
56	59
57	62
58	60
59	55
60	65
61	70
62	63
63	57
64	66
65	64
66	68
67	72
68	69
69	67
70	81
71	75
72	78
73	71
74	53
75	79
76	97
77	96
78	74

[1, 7, 14, 2, 4, 3, 6, 8, 10, 5, 12, 9, 13, 16, 18, 15, 20, 21, 22, 11, 23, 36, 24, 26, 28, 29, 47, 46, 30, 25, 35, 40, 32, 34, 17, 19, 33, 27, 31, 42, 38, 41, 37, 39, 45, 48, 44, 50, 49, 43, 51, 54, 52, 56, 58, 59, 62, 60, 55, 65, 70, 63, 57, 66, 64, 68, 72, 69, 67, 81, 75, 78, 71, 53, 79, 97, 96, 74]

cp's OEIS Frontend

A258767 With a(1) = 1, a(n) is the smallest number not already in the sequence such that a(n)^2 + a(n-1)^2 is not squarefree.

Table of values

List of values

n	a(n)
1	1
2	7
3	14
4	2
5	4
6	3
7	6
8	8
9	10
10	5
11	12
12	9
13	13
14	16
15	18
16	15
17	20
18	21
19	22
20	11
21	23
22	36
23	24
24	26
25	28
26	29
27	47
28	46
29	30
30	25
31	35
32	40
33	32
34	34
35	17
36	19
37	33
38	27
39	31
40	42
41	38
42	41
43	37
44	39
45	45
46	48
47	44
48	50
49	49
50	43
51	51
52	54
53	52
54	56
55	58
56	59
57	62
58	60
59	55
60	65
61	70
62	63
63	57
64	66
65	64
66	68
67	72
68	69
69	67
70	81
71	75
72	78
73	71
74	53
75	79
76	97
77	96
78	74

n	a(n)
1	1
2	7
3	14
4	2
5	4
6	3
7	6
8	8
9	10
10	5
11	12
12	9
13	13
14	16
15	18
16	15
17	20
18	21
19	22
20	11
21	23
22	36
23	24
24	26
25	28
26	29
27	47
28	46
29	30
30	25
31	35
32	40
33	32
34	34
35	17
36	19
37	33
38	27
39	31
40	42
41	38
42	41
43	37
44	39
45	45
46	48
47	44
48	50
49	49
50	43
51	51
52	54
53	52
54	56
55	58
56	59
57	62
58	60
59	55
60	65
61	70
62	63
63	57
64	66
65	64
66	68
67	72
68	69
69	67
70	81
71	75
72	78
73	71
74	53
75	79
76	97
77	96
78	74

n	a(n)
1	1
2	7
3	14
4	2
5	4
6	3
7	6
8	8
9	10
10	5
11	12
12	9
13	13
14	16
15	18
16	15
17	20
18	21
19	22
20	11
21	23
22	36
23	24
24	26
25	28
26	29
27	47
28	46
29	30
30	25
31	35
32	40
33	32
34	34
35	17
36	19
37	33
38	27
39	31
40	42
41	38
42	41
43	37
44	39
45	45
46	48
47	44
48	50
49	49
50	43
51	51
52	54
53	52
54	56
55	58
56	59
57	62
58	60
59	55
60	65
61	70
62	63
63	57
64	66
65	64
66	68
67	72
68	69
69	67
70	81
71	75
72	78
73	71
74	53
75	79
76	97
77	96
78	74