A268131 - cp's OEIS frontend

A268131 If a(n) is not squarefree, then a(n+1) = a(n) + a(n-1), else a(n+1) is the smallest positive integer not occurring earlier.

n	a(n)
1	1
2	2
3	3
4	4
5	7
6	5
7	6
8	8
9	14
10	9
11	23
12	10
13	11
14	12
15	23
16	13
17	15
18	16
19	31
20	17
21	18
22	35
23	19
24	20
25	39
26	21
27	22
28	24
29	46
30	25
31	71
32	26
33	27
34	53
35	28
36	81
37	109
38	29
39	30
40	32
41	62
42	33
43	34
44	36
45	70
46	37
47	38
48	40
49	78
50	41
51	42
52	43
53	44
54	87
55	45
56	132
57	177
58	47
59	48
60	95
61	49
62	144
63	193
64	50
65	243

[1, 2, 3, 4, 7, 5, 6, 8, 14, 9, 23, 10, 11, 12, 23, 13, 15, 16, 31, 17, 18, 35, 19, 20, 39, 21, 22, 24, 46, 25, 71, 26, 27, 53, 28, 81, 109, 29, 30, 32, 62, 33, 34, 36, 70, 37, 38, 40, 78, 41, 42, 43, 44, 87, 45, 132, 177, 47, 48, 95, 49, 144, 193, 50, 243]

cp's OEIS Frontend

A268131 If a(n) is not squarefree, then a(n+1) = a(n) + a(n-1), else a(n+1) is the smallest positive integer not occurring earlier.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	7
6	5
7	6
8	8
9	14
10	9
11	23
12	10
13	11
14	12
15	23
16	13
17	15
18	16
19	31
20	17
21	18
22	35
23	19
24	20
25	39
26	21
27	22
28	24
29	46
30	25
31	71
32	26
33	27
34	53
35	28
36	81
37	109
38	29
39	30
40	32
41	62
42	33
43	34
44	36
45	70
46	37
47	38
48	40
49	78
50	41
51	42
52	43
53	44
54	87
55	45
56	132
57	177
58	47
59	48
60	95
61	49
62	144
63	193
64	50
65	243

n	a(n)
1	1
2	2
3	3
4	4
5	7
6	5
7	6
8	8
9	14
10	9
11	23
12	10
13	11
14	12
15	23
16	13
17	15
18	16
19	31
20	17
21	18
22	35
23	19
24	20
25	39
26	21
27	22
28	24
29	46
30	25
31	71
32	26
33	27
34	53
35	28
36	81
37	109
38	29
39	30
40	32
41	62
42	33
43	34
44	36
45	70
46	37
47	38
48	40
49	78
50	41
51	42
52	43
53	44
54	87
55	45
56	132
57	177
58	47
59	48
60	95
61	49
62	144
63	193
64	50
65	243

n	a(n)
1	1
2	2
3	3
4	4
5	7
6	5
7	6
8	8
9	14
10	9
11	23
12	10
13	11
14	12
15	23
16	13
17	15
18	16
19	31
20	17
21	18
22	35
23	19
24	20
25	39
26	21
27	22
28	24
29	46
30	25
31	71
32	26
33	27
34	53
35	28
36	81
37	109
38	29
39	30
40	32
41	62
42	33
43	34
44	36
45	70
46	37
47	38
48	40
49	78
50	41
51	42
52	43
53	44
54	87
55	45
56	132
57	177
58	47
59	48
60	95
61	49
62	144
63	193
64	50
65	243