A285735 - cp's OEIS frontend

A285735 a(1) = 1, and for n > 1, a(n) = the least squarefree number x such that x > n-x, and n-x is also squarefree.

n	a(n)
1	1
2	1
3	2
4	2
5	3
6	3
7	5
8	5
9	6
10	5
11	6
12	6
13	7
14	7
15	10
16	10
17	10
18	11
19	13
20	10
21	11
22	11
23	13
24	13
25	14
26	13
27	14
28	14
29	15
30	15
31	17
32	17
33	19
34	17
35	21
36	19
37	22
38	19
39	22
40	21
41	22
42	21
43	22
44	22
45	23
46	23
47	26
48	26
49	26
50	29
51	29
52	26
53	30
54	31
55	29
56	30
57	31
58	29
59	30
60	30
61	31
62	31
63	33
64	33
65	34
66	33
67	34
68	34
69	35
70	35
71	37
72	37
73	38
74	37
75	38
76	38
77	39
78	39
79	41
80	41
81	42
82	41
83	42
84	42
85	43
86	43
87	46
88	46
89	46
90	47
91	53
92	46
93	47
94	47

[1, 1, 2, 2, 3, 3, 5, 5, 6, 5, 6, 6, 7, 7, 10, 10, 10, 11, 13, 10, 11, 11, 13, 13, 14, 13, 14, 14, 15, 15, 17, 17, 19, 17, 21, 19, 22, 19, 22, 21, 22, 21, 22, 22, 23, 23, 26, 26, 26, 29, 29, 26, 30, 31, 29, 30, 31, 29, 30, 30, 31, 31, 33, 33, 34, 33, 34, 34, 35, 35, 37, 37, 38, 37, 38, 38, 39, 39, 41, 41, 42, 41, 42, 42, 43, 43, 46, 46, 46, 47, 53, 46, 47, 47]

cp's OEIS Frontend

A285735 a(1) = 1, and for n > 1, a(n) = the least squarefree number x such that x > n-x, and n-x is also squarefree.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	2
5	3
6	3
7	5
8	5
9	6
10	5
11	6
12	6
13	7
14	7
15	10
16	10
17	10
18	11
19	13
20	10
21	11
22	11
23	13
24	13
25	14
26	13
27	14
28	14
29	15
30	15
31	17
32	17
33	19
34	17
35	21
36	19
37	22
38	19
39	22
40	21
41	22
42	21
43	22
44	22
45	23
46	23
47	26
48	26
49	26
50	29
51	29
52	26
53	30
54	31
55	29
56	30
57	31
58	29
59	30
60	30
61	31
62	31
63	33
64	33
65	34
66	33
67	34
68	34
69	35
70	35
71	37
72	37
73	38
74	37
75	38
76	38
77	39
78	39
79	41
80	41
81	42
82	41
83	42
84	42
85	43
86	43
87	46
88	46
89	46
90	47
91	53
92	46
93	47
94	47

n	a(n)
1	1
2	1
3	2
4	2
5	3
6	3
7	5
8	5
9	6
10	5
11	6
12	6
13	7
14	7
15	10
16	10
17	10
18	11
19	13
20	10
21	11
22	11
23	13
24	13
25	14
26	13
27	14
28	14
29	15
30	15
31	17
32	17
33	19
34	17
35	21
36	19
37	22
38	19
39	22
40	21
41	22
42	21
43	22
44	22
45	23
46	23
47	26
48	26
49	26
50	29
51	29
52	26
53	30
54	31
55	29
56	30
57	31
58	29
59	30
60	30
61	31
62	31
63	33
64	33
65	34
66	33
67	34
68	34
69	35
70	35
71	37
72	37
73	38
74	37
75	38
76	38
77	39
78	39
79	41
80	41
81	42
82	41
83	42
84	42
85	43
86	43
87	46
88	46
89	46
90	47
91	53
92	46
93	47
94	47

n	a(n)
1	1
2	1
3	2
4	2
5	3
6	3
7	5
8	5
9	6
10	5
11	6
12	6
13	7
14	7
15	10
16	10
17	10
18	11
19	13
20	10
21	11
22	11
23	13
24	13
25	14
26	13
27	14
28	14
29	15
30	15
31	17
32	17
33	19
34	17
35	21
36	19
37	22
38	19
39	22
40	21
41	22
42	21
43	22
44	22
45	23
46	23
47	26
48	26
49	26
50	29
51	29
52	26
53	30
54	31
55	29
56	30
57	31
58	29
59	30
60	30
61	31
62	31
63	33
64	33
65	34
66	33
67	34
68	34
69	35
70	35
71	37
72	37
73	38
74	37
75	38
76	38
77	39
78	39
79	41
80	41
81	42
82	41
83	42
84	42
85	43
86	43
87	46
88	46
89	46
90	47
91	53
92	46
93	47
94	47