A342695 - cp's OEIS frontend

A342695 a(n) is the number of primes in an n X n square array that do not appear on its border, with the elements of the square array being the numbers from 1..n^2, listed in increasing order by rows.

n	a(n)
1	0
2	0
3	1
4	2
5	4
6	4
7	8
8	10
9	14
10	15
11	21
12	21
13	27
14	31
15	36
16	42
17	48
18	46
19	58
20	61
21	68
22	73
23	83
24	83
25	96
26	100
27	110
28	114
29	127
30	123
31	144
32	146
33	157
34	165
35	175
36	179
37	201
38	201
39	212
40	221
41	241
42	235
43	258
44	265
45	275
46	282
47	303
48	301
49	328
50	330
51	346
52	351
53	381
54	377
55	403
56	406
57	427
58	433
59	455
60	452
61	486
62	493

[0, 0, 1, 2, 4, 4, 8, 10, 14, 15, 21, 21, 27, 31, 36, 42, 48, 46, 58, 61, 68, 73, 83, 83, 96, 100, 110, 114, 127, 123, 144, 146, 157, 165, 175, 179, 201, 201, 212, 221, 241, 235, 258, 265, 275, 282, 303, 301, 328, 330, 346, 351, 381, 377, 403, 406, 427, 433, 455, 452, 486, 493]

cp's OEIS Frontend

A342695 a(n) is the number of primes in an n X n square array that do not appear on its border, with the elements of the square array being the numbers from 1..n^2, listed in increasing order by rows.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	2
5	4
6	4
7	8
8	10
9	14
10	15
11	21
12	21
13	27
14	31
15	36
16	42
17	48
18	46
19	58
20	61
21	68
22	73
23	83
24	83
25	96
26	100
27	110
28	114
29	127
30	123
31	144
32	146
33	157
34	165
35	175
36	179
37	201
38	201
39	212
40	221
41	241
42	235
43	258
44	265
45	275
46	282
47	303
48	301
49	328
50	330
51	346
52	351
53	381
54	377
55	403
56	406
57	427
58	433
59	455
60	452
61	486
62	493

n	a(n)
1	0
2	0
3	1
4	2
5	4
6	4
7	8
8	10
9	14
10	15
11	21
12	21
13	27
14	31
15	36
16	42
17	48
18	46
19	58
20	61
21	68
22	73
23	83
24	83
25	96
26	100
27	110
28	114
29	127
30	123
31	144
32	146
33	157
34	165
35	175
36	179
37	201
38	201
39	212
40	221
41	241
42	235
43	258
44	265
45	275
46	282
47	303
48	301
49	328
50	330
51	346
52	351
53	381
54	377
55	403
56	406
57	427
58	433
59	455
60	452
61	486
62	493

n	a(n)
1	0
2	0
3	1
4	2
5	4
6	4
7	8
8	10
9	14
10	15
11	21
12	21
13	27
14	31
15	36
16	42
17	48
18	46
19	58
20	61
21	68
22	73
23	83
24	83
25	96
26	100
27	110
28	114
29	127
30	123
31	144
32	146
33	157
34	165
35	175
36	179
37	201
38	201
39	212
40	221
41	241
42	235
43	258
44	265
45	275
46	282
47	303
48	301
49	328
50	330
51	346
52	351
53	381
54	377
55	403
56	406
57	427
58	433
59	455
60	452
61	486
62	493