A084834 - cp's OEIS frontend

A084834 a(n) is the smallest number not previously used such that a(n)+a(n-1), a(n)+a(n-1)+a(n-2), ..., a(n)+...+a(1) are not prime.

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	15
9	17
10	4
11	6
12	30
13	38
14	10
15	36
16	14
17	34
18	42
19	39
20	21
21	69
22	27
23	33
24	45
25	20
26	16
27	24
28	50
29	25
30	51
31	66
32	18
33	72
34	54
35	60
36	74
37	22
38	8
39	19
40	41
41	28
42	48
43	44
44	40
45	78
46	57
47	35
48	58
49	102
50	12
51	63
52	65
53	64
54	56
55	46
56	96
57	68
58	76
59	114
60	80
61	52
62	84
63	90
64	99
65	55
66	2
67	93
68	75
69	100
70	62
71	120
72	98

[1, 3, 5, 7, 9, 11, 13, 15, 17, 4, 6, 30, 38, 10, 36, 14, 34, 42, 39, 21, 69, 27, 33, 45, 20, 16, 24, 50, 25, 51, 66, 18, 72, 54, 60, 74, 22, 8, 19, 41, 28, 48, 44, 40, 78, 57, 35, 58, 102, 12, 63, 65, 64, 56, 46, 96, 68, 76, 114, 80, 52, 84, 90, 99, 55, 2, 93, 75, 100, 62, 120, 98]

cp's OEIS Frontend

A084834 a(n) is the smallest number not previously used such that a(n)+a(n-1), a(n)+a(n-1)+a(n-2), ..., a(n)+...+a(1) are not prime.

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	15
9	17
10	4
11	6
12	30
13	38
14	10
15	36
16	14
17	34
18	42
19	39
20	21
21	69
22	27
23	33
24	45
25	20
26	16
27	24
28	50
29	25
30	51
31	66
32	18
33	72
34	54
35	60
36	74
37	22
38	8
39	19
40	41
41	28
42	48
43	44
44	40
45	78
46	57
47	35
48	58
49	102
50	12
51	63
52	65
53	64
54	56
55	46
56	96
57	68
58	76
59	114
60	80
61	52
62	84
63	90
64	99
65	55
66	2
67	93
68	75
69	100
70	62
71	120
72	98

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	15
9	17
10	4
11	6
12	30
13	38
14	10
15	36
16	14
17	34
18	42
19	39
20	21
21	69
22	27
23	33
24	45
25	20
26	16
27	24
28	50
29	25
30	51
31	66
32	18
33	72
34	54
35	60
36	74
37	22
38	8
39	19
40	41
41	28
42	48
43	44
44	40
45	78
46	57
47	35
48	58
49	102
50	12
51	63
52	65
53	64
54	56
55	46
56	96
57	68
58	76
59	114
60	80
61	52
62	84
63	90
64	99
65	55
66	2
67	93
68	75
69	100
70	62
71	120
72	98

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	15
9	17
10	4
11	6
12	30
13	38
14	10
15	36
16	14
17	34
18	42
19	39
20	21
21	69
22	27
23	33
24	45
25	20
26	16
27	24
28	50
29	25
30	51
31	66
32	18
33	72
34	54
35	60
36	74
37	22
38	8
39	19
40	41
41	28
42	48
43	44
44	40
45	78
46	57
47	35
48	58
49	102
50	12
51	63
52	65
53	64
54	56
55	46
56	96
57	68
58	76
59	114
60	80
61	52
62	84
63	90
64	99
65	55
66	2
67	93
68	75
69	100
70	62
71	120
72	98