A376926 - cp's OEIS frontend

A376926 a(n) is the number of ways n can be written as x + y with x >= y, x and y coprime, and so that the distinct prime factors of xyn are consecutive primes starting with 2.

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	1
7	0
8	1
9	2
10	2
11	0
12	1
13	0
14	1
15	2
16	1
17	0
18	0
19	0
20	0
21	3
22	1
23	0
24	0
25	4
26	0
27	2
28	1
29	0
30	0
31	0
32	1
33	1
34	0
35	4
36	1
37	0
38	0
39	0
40	1
41	0
42	0
43	0
44	1
45	0
46	0
47	0
48	0
49	3
50	0
51	0
52	0
53	0
54	1
55	4
56	1
57	0
58	0
59	0
60	1
61	0
62	0
63	1
64	1
65	1
66	0
67	0
68	0
69	0
70	0
71	0
72	0
73	0
74	0
75	0
76	0
77	5
78	0
79	0
80	1
81	3
82	0
83	0
84	0
85	0
86	0
87	0
88	1
89	0
90	1

[0, 1, 1, 1, 1, 1, 0, 1, 2, 2, 0, 1, 0, 1, 2, 1, 0, 0, 0, 0, 3, 1, 0, 0, 4, 0, 2, 1, 0, 0, 0, 1, 1, 0, 4, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 3, 0, 0, 0, 0, 1, 4, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 1, 3, 0, 0, 0, 0, 0, 0, 1, 0, 1]

cp's OEIS Frontend

A376926 a(n) is the number of ways n can be written as x + y with x >= y, x and y coprime, and so that the distinct prime factors of xyn are consecutive primes starting with 2.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	1
7	0
8	1
9	2
10	2
11	0
12	1
13	0
14	1
15	2
16	1
17	0
18	0
19	0
20	0
21	3
22	1
23	0
24	0
25	4
26	0
27	2
28	1
29	0
30	0
31	0
32	1
33	1
34	0
35	4
36	1
37	0
38	0
39	0
40	1
41	0
42	0
43	0
44	1
45	0
46	0
47	0
48	0
49	3
50	0
51	0
52	0
53	0
54	1
55	4
56	1
57	0
58	0
59	0
60	1
61	0
62	0
63	1
64	1
65	1
66	0
67	0
68	0
69	0
70	0
71	0
72	0
73	0
74	0
75	0
76	0
77	5
78	0
79	0
80	1
81	3
82	0
83	0
84	0
85	0
86	0
87	0
88	1
89	0
90	1

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	1
7	0
8	1
9	2
10	2
11	0
12	1
13	0
14	1
15	2
16	1
17	0
18	0
19	0
20	0
21	3
22	1
23	0
24	0
25	4
26	0
27	2
28	1
29	0
30	0
31	0
32	1
33	1
34	0
35	4
36	1
37	0
38	0
39	0
40	1
41	0
42	0
43	0
44	1
45	0
46	0
47	0
48	0
49	3
50	0
51	0
52	0
53	0
54	1
55	4
56	1
57	0
58	0
59	0
60	1
61	0
62	0
63	1
64	1
65	1
66	0
67	0
68	0
69	0
70	0
71	0
72	0
73	0
74	0
75	0
76	0
77	5
78	0
79	0
80	1
81	3
82	0
83	0
84	0
85	0
86	0
87	0
88	1
89	0
90	1

cp's OEIS Frontend

A376926 a(n) is the number of ways n can be written as x + y with x >= y, x and y coprime, and so that the distinct prime factors of x*y*n are consecutive primes starting with 2.

Table of values

List of values

A376926 a(n) is the number of ways n can be written as x + y with x >= y, x and y coprime, and so that the distinct prime factors of xyn are consecutive primes starting with 2.

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	1
7	0
8	1
9	2
10	2
11	0
12	1
13	0
14	1
15	2
16	1
17	0
18	0
19	0
20	0
21	3
22	1
23	0
24	0
25	4
26	0
27	2
28	1
29	0
30	0
31	0
32	1
33	1
34	0
35	4
36	1
37	0
38	0
39	0
40	1
41	0
42	0
43	0
44	1
45	0
46	0
47	0
48	0
49	3
50	0
51	0
52	0
53	0
54	1
55	4
56	1
57	0
58	0
59	0
60	1
61	0
62	0
63	1
64	1
65	1
66	0
67	0
68	0
69	0
70	0
71	0
72	0
73	0
74	0
75	0
76	0
77	5
78	0
79	0
80	1
81	3
82	0
83	0
84	0
85	0
86	0
87	0
88	1
89	0
90	1