A285720 - cp's OEIS frontend

A285720 Number of ways to write n as a sum of two unordered squarefree numbers so that their addition in base-2 does not produce carries.

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	0
7	2
8	0
9	0
10	0
11	1
12	0
13	0
14	0
15	3
16	0
17	0
18	0
19	1
20	0
21	0
22	0
23	3
24	0
25	0
26	0
27	2
28	0
29	0
30	0
31	5
32	0
33	0
34	0
35	2
36	0
37	0
38	0
39	4
40	0
41	0
42	0
43	3
44	0
45	0
46	0
47	6
48	0
49	0
50	0
51	1
52	0
53	0
54	0
55	4
56	0
57	0
58	0
59	4
60	0
61	0
62	0
63	11
64	0
65	0
66	0
67	2
68	0
69	0
70	0
71	4
72	0
73	0
74	0
75	3
76	0
77	0
78	0
79	7
80	0
81	0
82	0
83	2
84	0
85	0
86	0
87	6
88	0
89	0
90	0
91	3
92	0
93	0
94	0
95	11
96	0
97	0
98	0
99	3
100	0
101	0
102	0
103	7
104	0
105	0
106	0
107	7
108	0
109	0
110	0
111	13
112	0
113	0
114	0
115	3
116	0
117	0
118	0
119	9
120	0

[0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 3, 0, 0, 0, 1, 0, 0, 0, 3, 0, 0, 0, 2, 0, 0, 0, 5, 0, 0, 0, 2, 0, 0, 0, 4, 0, 0, 0, 3, 0, 0, 0, 6, 0, 0, 0, 1, 0, 0, 0, 4, 0, 0, 0, 4, 0, 0, 0, 11, 0, 0, 0, 2, 0, 0, 0, 4, 0, 0, 0, 3, 0, 0, 0, 7, 0, 0, 0, 2, 0, 0, 0, 6, 0, 0, 0, 3, 0, 0, 0, 11, 0, 0, 0, 3, 0, 0, 0, 7, 0, 0, 0, 7, 0, 0, 0, 13, 0, 0, 0, 3, 0, 0, 0, 9, 0]

cp's OEIS Frontend

A285720 Number of ways to write n as a sum of two unordered squarefree numbers so that their addition in base-2 does not produce carries.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	0
7	2
8	0
9	0
10	0
11	1
12	0
13	0
14	0
15	3
16	0
17	0
18	0
19	1
20	0
21	0
22	0
23	3
24	0
25	0
26	0
27	2
28	0
29	0
30	0
31	5
32	0
33	0
34	0
35	2
36	0
37	0
38	0
39	4
40	0
41	0
42	0
43	3
44	0
45	0
46	0
47	6
48	0
49	0
50	0
51	1
52	0
53	0
54	0
55	4
56	0
57	0
58	0
59	4
60	0
61	0
62	0
63	11
64	0
65	0
66	0
67	2
68	0
69	0
70	0
71	4
72	0
73	0
74	0
75	3
76	0
77	0
78	0
79	7
80	0
81	0
82	0
83	2
84	0
85	0
86	0
87	6
88	0
89	0
90	0
91	3
92	0
93	0
94	0
95	11
96	0
97	0
98	0
99	3
100	0
101	0
102	0
103	7
104	0
105	0
106	0
107	7
108	0
109	0
110	0
111	13
112	0
113	0
114	0
115	3
116	0
117	0
118	0
119	9
120	0

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	0
7	2
8	0
9	0
10	0
11	1
12	0
13	0
14	0
15	3
16	0
17	0
18	0
19	1
20	0
21	0
22	0
23	3
24	0
25	0
26	0
27	2
28	0
29	0
30	0
31	5
32	0
33	0
34	0
35	2
36	0
37	0
38	0
39	4
40	0
41	0
42	0
43	3
44	0
45	0
46	0
47	6
48	0
49	0
50	0
51	1
52	0
53	0
54	0
55	4
56	0
57	0
58	0
59	4
60	0
61	0
62	0
63	11
64	0
65	0
66	0
67	2
68	0
69	0
70	0
71	4
72	0
73	0
74	0
75	3
76	0
77	0
78	0
79	7
80	0
81	0
82	0
83	2
84	0
85	0
86	0
87	6
88	0
89	0
90	0
91	3
92	0
93	0
94	0
95	11
96	0
97	0
98	0
99	3
100	0
101	0
102	0
103	7
104	0
105	0
106	0
107	7
108	0
109	0
110	0
111	13
112	0
113	0
114	0
115	3
116	0
117	0
118	0
119	9
120	0

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	0
7	2
8	0
9	0
10	0
11	1
12	0
13	0
14	0
15	3
16	0
17	0
18	0
19	1
20	0
21	0
22	0
23	3
24	0
25	0
26	0
27	2
28	0
29	0
30	0
31	5
32	0
33	0
34	0
35	2
36	0
37	0
38	0
39	4
40	0
41	0
42	0
43	3
44	0
45	0
46	0
47	6
48	0
49	0
50	0
51	1
52	0
53	0
54	0
55	4
56	0
57	0
58	0
59	4
60	0
61	0
62	0
63	11
64	0
65	0
66	0
67	2
68	0
69	0
70	0
71	4
72	0
73	0
74	0
75	3
76	0
77	0
78	0
79	7
80	0
81	0
82	0
83	2
84	0
85	0
86	0
87	6
88	0
89	0
90	0
91	3
92	0
93	0
94	0
95	11
96	0
97	0
98	0
99	3
100	0
101	0
102	0
103	7
104	0
105	0
106	0
107	7
108	0
109	0
110	0
111	13
112	0
113	0
114	0
115	3
116	0
117	0
118	0
119	9
120	0