A180405 - cp's OEIS frontend

A180405 Smallest integer not yet present in the sequence such that the sum of the first a(n) terms of the sequence is a prime.

n	a(n)
1	2
2	1
3	4
4	6
5	3
6	7
7	8
8	10
9	11
10	15
11	12
12	18
13	14
14	16
15	22
16	24
17	19
18	31
19	28
20	20
21	23
22	37
23	36
24	30
25	26
26	34
27	29
28	35
29	42
30	38
31	40
32	32
33	39
34	45
35	52
36	44
37	54
38	46
39	56
40	60
41	43
42	51
43	50
44	64
45	84
46	48
47	49
48	53
49	68
50	58
51	62
52	78
53	70
54	66
55	57
56	59
57	82
58	92
59	90
60	88
61	63
62	77
63	72
64	94
65	67
66	79
67	76
68	102
69	71
70	81
71	96
72	100

[2, 1, 4, 6, 3, 7, 8, 10, 11, 15, 12, 18, 14, 16, 22, 24, 19, 31, 28, 20, 23, 37, 36, 30, 26, 34, 29, 35, 42, 38, 40, 32, 39, 45, 52, 44, 54, 46, 56, 60, 43, 51, 50, 64, 84, 48, 49, 53, 68, 58, 62, 78, 70, 66, 57, 59, 82, 92, 90, 88, 63, 77, 72, 94, 67, 79, 76, 102, 71, 81, 96, 100]

cp's OEIS Frontend

A180405 Smallest integer not yet present in the sequence such that the sum of the first a(n) terms of the sequence is a prime.

Table of values

List of values

n	a(n)
1	2
2	1
3	4
4	6
5	3
6	7
7	8
8	10
9	11
10	15
11	12
12	18
13	14
14	16
15	22
16	24
17	19
18	31
19	28
20	20
21	23
22	37
23	36
24	30
25	26
26	34
27	29
28	35
29	42
30	38
31	40
32	32
33	39
34	45
35	52
36	44
37	54
38	46
39	56
40	60
41	43
42	51
43	50
44	64
45	84
46	48
47	49
48	53
49	68
50	58
51	62
52	78
53	70
54	66
55	57
56	59
57	82
58	92
59	90
60	88
61	63
62	77
63	72
64	94
65	67
66	79
67	76
68	102
69	71
70	81
71	96
72	100

n	a(n)
1	2
2	1
3	4
4	6
5	3
6	7
7	8
8	10
9	11
10	15
11	12
12	18
13	14
14	16
15	22
16	24
17	19
18	31
19	28
20	20
21	23
22	37
23	36
24	30
25	26
26	34
27	29
28	35
29	42
30	38
31	40
32	32
33	39
34	45
35	52
36	44
37	54
38	46
39	56
40	60
41	43
42	51
43	50
44	64
45	84
46	48
47	49
48	53
49	68
50	58
51	62
52	78
53	70
54	66
55	57
56	59
57	82
58	92
59	90
60	88
61	63
62	77
63	72
64	94
65	67
66	79
67	76
68	102
69	71
70	81
71	96
72	100

n	a(n)
1	2
2	1
3	4
4	6
5	3
6	7
7	8
8	10
9	11
10	15
11	12
12	18
13	14
14	16
15	22
16	24
17	19
18	31
19	28
20	20
21	23
22	37
23	36
24	30
25	26
26	34
27	29
28	35
29	42
30	38
31	40
32	32
33	39
34	45
35	52
36	44
37	54
38	46
39	56
40	60
41	43
42	51
43	50
44	64
45	84
46	48
47	49
48	53
49	68
50	58
51	62
52	78
53	70
54	66
55	57
56	59
57	82
58	92
59	90
60	88
61	63
62	77
63	72
64	94
65	67
66	79
67	76
68	102
69	71
70	81
71	96
72	100