A054408 - cp's OEIS frontend

A054408 a(n) = smallest positive integer not already in sequence such that the partial sum a(1)+...+a(n) is prime.

n	a(n)
1	2
2	1
3	4
4	6
5	10
6	8
7	12
8	16
9	14
10	24
11	30
12	22
13	18
14	26
15	34
16	36
17	20
18	28
19	38
20	40
21	32
22	42
23	46
24	48
25	44
26	52
27	56
28	60
29	54
30	58
31	66
32	50
33	64
34	62
35	70
36	84
37	90
38	72
39	92
40	76
41	86
42	94
43	74
44	88
45	68
46	82
47	80
48	102
49	96
50	100
51	114
52	98
53	78
54	112
55	120
56	110
57	108
58	106
59	126
60	122
61	130
62	132
63	134
64	124
65	128
66	118

[2, 1, 4, 6, 10, 8, 12, 16, 14, 24, 30, 22, 18, 26, 34, 36, 20, 28, 38, 40, 32, 42, 46, 48, 44, 52, 56, 60, 54, 58, 66, 50, 64, 62, 70, 84, 90, 72, 92, 76, 86, 94, 74, 88, 68, 82, 80, 102, 96, 100, 114, 98, 78, 112, 120, 110, 108, 106, 126, 122, 130, 132, 134, 124, 128, 118]

cp's OEIS Frontend

A054408 a(n) = smallest positive integer not already in sequence such that the partial sum a(1)+...+a(n) is prime.

Table of values

List of values

n	a(n)
1	2
2	1
3	4
4	6
5	10
6	8
7	12
8	16
9	14
10	24
11	30
12	22
13	18
14	26
15	34
16	36
17	20
18	28
19	38
20	40
21	32
22	42
23	46
24	48
25	44
26	52
27	56
28	60
29	54
30	58
31	66
32	50
33	64
34	62
35	70
36	84
37	90
38	72
39	92
40	76
41	86
42	94
43	74
44	88
45	68
46	82
47	80
48	102
49	96
50	100
51	114
52	98
53	78
54	112
55	120
56	110
57	108
58	106
59	126
60	122
61	130
62	132
63	134
64	124
65	128
66	118

n	a(n)
1	2
2	1
3	4
4	6
5	10
6	8
7	12
8	16
9	14
10	24
11	30
12	22
13	18
14	26
15	34
16	36
17	20
18	28
19	38
20	40
21	32
22	42
23	46
24	48
25	44
26	52
27	56
28	60
29	54
30	58
31	66
32	50
33	64
34	62
35	70
36	84
37	90
38	72
39	92
40	76
41	86
42	94
43	74
44	88
45	68
46	82
47	80
48	102
49	96
50	100
51	114
52	98
53	78
54	112
55	120
56	110
57	108
58	106
59	126
60	122
61	130
62	132
63	134
64	124
65	128
66	118

n	a(n)
1	2
2	1
3	4
4	6
5	10
6	8
7	12
8	16
9	14
10	24
11	30
12	22
13	18
14	26
15	34
16	36
17	20
18	28
19	38
20	40
21	32
22	42
23	46
24	48
25	44
26	52
27	56
28	60
29	54
30	58
31	66
32	50
33	64
34	62
35	70
36	84
37	90
38	72
39	92
40	76
41	86
42	94
43	74
44	88
45	68
46	82
47	80
48	102
49	96
50	100
51	114
52	98
53	78
54	112
55	120
56	110
57	108
58	106
59	126
60	122
61	130
62	132
63	134
64	124
65	128
66	118