A242950 - cp's OEIS frontend

A242950 Number of ordered ways to write n = k + m with k > 1 and m > 1 such that the least nonnegative residue of prime(k) modulo k is a square and the least nonnegative residue of prime(m) modulo m is a prime.

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

[0, 0, 0, 0, 1, 1, 0, 1, 3, 2, 1, 1, 3, 4, 4, 1, 3, 5, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 3, 5, 2, 5, 3, 5, 3, 6, 3, 7, 4, 6, 5, 7, 5, 9, 7, 6, 4, 6, 5, 9, 5, 6, 8, 7, 8, 5, 8, 5, 8, 4, 8, 6, 7, 4, 7, 4, 6, 4, 5, 4, 8, 2, 3, 4, 5, 4, 5, 6, 7, 7]

cp's OEIS Frontend

A242950 Number of ordered ways to write n = k + m with k > 1 and m > 1 such that the least nonnegative residue of prime(k) modulo k is a square and the least nonnegative residue of prime(m) modulo m is a prime.

Table of values

List of values

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

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

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