A138205 - cp's OEIS frontend

A138205 Least number k such that n^2+k and n^2+k+2 are the smallest twin primes between squares n^2 and (n+1)^2, or 0 if there is no such k.

n	a(n)
1	0
2	1
3	2
4	1
5	4
6	5
7	10
8	7
9	0
10	1
11	16
12	5
13	10
14	1
15	2
16	13
17	22
18	23
19	0
20	19
21	20
22	37
23	40
24	23
25	16
26	0
27	0
28	25
29	16
30	0
31	58
32	7
33	2
34	0
35	4
36	5
37	58
38	7
39	0
40	7
41	16
42	23
43	22
44	13
45	2
46	13
47	28
48	5
49	0
50	49
51	56
52	7
53	0
54	53
55	94
56	31
57	2
58	7
59	46
60	71
61	46
62	7
63	32
64	31
65	4
66	65
67	28
68	13
69	26
70	31
71	58
72	47
73	88
74	1
75	14
76	73
77	0
78	5
79	28
80	49
81	8
82	37

[0, 1, 2, 1, 4, 5, 10, 7, 0, 1, 16, 5, 10, 1, 2, 13, 22, 23, 0, 19, 20, 37, 40, 23, 16, 0, 0, 25, 16, 0, 58, 7, 2, 0, 4, 5, 58, 7, 0, 7, 16, 23, 22, 13, 2, 13, 28, 5, 0, 49, 56, 7, 0, 53, 94, 31, 2, 7, 46, 71, 46, 7, 32, 31, 4, 65, 28, 13, 26, 31, 58, 47, 88, 1, 14, 73, 0, 5, 28, 49, 8, 37]

cp's OEIS Frontend

A138205 Least number k such that n^2+k and n^2+k+2 are the smallest twin primes between squares n^2 and (n+1)^2, or 0 if there is no such k.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	1
5	4
6	5
7	10
8	7
9	0
10	1
11	16
12	5
13	10
14	1
15	2
16	13
17	22
18	23
19	0
20	19
21	20
22	37
23	40
24	23
25	16
26	0
27	0
28	25
29	16
30	0
31	58
32	7
33	2
34	0
35	4
36	5
37	58
38	7
39	0
40	7
41	16
42	23
43	22
44	13
45	2
46	13
47	28
48	5
49	0
50	49
51	56
52	7
53	0
54	53
55	94
56	31
57	2
58	7
59	46
60	71
61	46
62	7
63	32
64	31
65	4
66	65
67	28
68	13
69	26
70	31
71	58
72	47
73	88
74	1
75	14
76	73
77	0
78	5
79	28
80	49
81	8
82	37

n	a(n)
1	0
2	1
3	2
4	1
5	4
6	5
7	10
8	7
9	0
10	1
11	16
12	5
13	10
14	1
15	2
16	13
17	22
18	23
19	0
20	19
21	20
22	37
23	40
24	23
25	16
26	0
27	0
28	25
29	16
30	0
31	58
32	7
33	2
34	0
35	4
36	5
37	58
38	7
39	0
40	7
41	16
42	23
43	22
44	13
45	2
46	13
47	28
48	5
49	0
50	49
51	56
52	7
53	0
54	53
55	94
56	31
57	2
58	7
59	46
60	71
61	46
62	7
63	32
64	31
65	4
66	65
67	28
68	13
69	26
70	31
71	58
72	47
73	88
74	1
75	14
76	73
77	0
78	5
79	28
80	49
81	8
82	37

n	a(n)
1	0
2	1
3	2
4	1
5	4
6	5
7	10
8	7
9	0
10	1
11	16
12	5
13	10
14	1
15	2
16	13
17	22
18	23
19	0
20	19
21	20
22	37
23	40
24	23
25	16
26	0
27	0
28	25
29	16
30	0
31	58
32	7
33	2
34	0
35	4
36	5
37	58
38	7
39	0
40	7
41	16
42	23
43	22
44	13
45	2
46	13
47	28
48	5
49	0
50	49
51	56
52	7
53	0
54	53
55	94
56	31
57	2
58	7
59	46
60	71
61	46
62	7
63	32
64	31
65	4
66	65
67	28
68	13
69	26
70	31
71	58
72	47
73	88
74	1
75	14
76	73
77	0
78	5
79	28
80	49
81	8
82	37