A187815 - cp's OEIS frontend

A187815 Number of permutations q_1, ..., q_7 of the 7 consecutive primes p_n, p_{n+1}, ..., p_{n+6} with q_1 = p_n and q_7 = p_{n+6}, and with |q_1-q_2|, |q_2-q_3|, ..., |q_6-q_7|, |q_7-q_1| pairwise distinct, where p_k denotes the k-th prime.

n	a(n)
1	10
2	2
3	7
4	4
5	10
6	17
7	15
8	15
9	17
10	11
11	4
12	23
13	33
14	24
15	19
16	16
17	24
18	16
19	31
20	39
21	39
22	30
23	24
24	11
25	15
26	39
27	30
28	52
29	66
30	41
31	29
32	23
33	48
34	43
35	15
36	15
37	43
38	48
39	39
40	30
41	30
42	52
43	68
44	64
45	68
46	34
47	19
48	27
49	39
50	35
51	22
52	36
53	32
54	20
55	19
56	32
57	38
58	72
59	71
60	59

[10, 2, 7, 4, 10, 17, 15, 15, 17, 11, 4, 23, 33, 24, 19, 16, 24, 16, 31, 39, 39, 30, 24, 11, 15, 39, 30, 52, 66, 41, 29, 23, 48, 43, 15, 15, 43, 48, 39, 30, 30, 52, 68, 64, 68, 34, 19, 27, 39, 35, 22, 36, 32, 20, 19, 32, 38, 72, 71, 59]

cp's OEIS Frontend

A187815 Number of permutations q_1, ..., q_7 of the 7 consecutive primes p_n, p_{n+1}, ..., p_{n+6} with q_1 = p_n and q_7 = p_{n+6}, and with |q_1-q_2|, |q_2-q_3|, ..., |q_6-q_7|, |q_7-q_1| pairwise distinct, where p_k denotes the k-th prime.

Table of values

List of values

n	a(n)
1	10
2	2
3	7
4	4
5	10
6	17
7	15
8	15
9	17
10	11
11	4
12	23
13	33
14	24
15	19
16	16
17	24
18	16
19	31
20	39
21	39
22	30
23	24
24	11
25	15
26	39
27	30
28	52
29	66
30	41
31	29
32	23
33	48
34	43
35	15
36	15
37	43
38	48
39	39
40	30
41	30
42	52
43	68
44	64
45	68
46	34
47	19
48	27
49	39
50	35
51	22
52	36
53	32
54	20
55	19
56	32
57	38
58	72
59	71
60	59

n	a(n)
1	10
2	2
3	7
4	4
5	10
6	17
7	15
8	15
9	17
10	11
11	4
12	23
13	33
14	24
15	19
16	16
17	24
18	16
19	31
20	39
21	39
22	30
23	24
24	11
25	15
26	39
27	30
28	52
29	66
30	41
31	29
32	23
33	48
34	43
35	15
36	15
37	43
38	48
39	39
40	30
41	30
42	52
43	68
44	64
45	68
46	34
47	19
48	27
49	39
50	35
51	22
52	36
53	32
54	20
55	19
56	32
57	38
58	72
59	71
60	59

n	a(n)
1	10
2	2
3	7
4	4
5	10
6	17
7	15
8	15
9	17
10	11
11	4
12	23
13	33
14	24
15	19
16	16
17	24
18	16
19	31
20	39
21	39
22	30
23	24
24	11
25	15
26	39
27	30
28	52
29	66
30	41
31	29
32	23
33	48
34	43
35	15
36	15
37	43
38	48
39	39
40	30
41	30
42	52
43	68
44	64
45	68
46	34
47	19
48	27
49	39
50	35
51	22
52	36
53	32
54	20
55	19
56	32
57	38
58	72
59	71
60	59