A274329 - cp's OEIS frontend

A274329 Erase all pairs of contiguous terms that sum up to a prime; the remaining terms rebuild the starting sequence.

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

[1, 2, 4, 3, 1, 5, 6, 2, 4, 8, 9, 3, 1, 5, 7, 10, 6, 2, 4, 8, 12, 11, 9, 3, 1, 5, 7, 13, 16, 10, 6, 2, 4, 8, 12, 14, 15, 11, 9, 3, 1, 5, 7, 13, 17, 20, 16, 10, 6, 2, 4, 8, 12, 14, 18, 19, 15, 11, 9, 3, 1, 5, 7, 13, 17, 21, 22, 20, 16, 10, 6, 2, 4, 8, 12, 14, 18, 24, 23, 19, 15, 11, 9, 3, 1]

cp's OEIS Frontend

A274329 Erase all pairs of contiguous terms that sum up to a prime; the remaining terms rebuild the starting sequence.

Table of values

List of values

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

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

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