A120562 - cp's OEIS frontend

A120562 Sum of binomial coefficients binomial(i+j, i) modulo 2 over all pairs (i,j) of positive integers satisfying 3i+j=n.

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

[1, 1, 1, 2, 1, 2, 2, 3, 1, 3, 2, 3, 2, 4, 3, 5, 1, 4, 3, 4, 2, 5, 3, 5, 2, 5, 4, 6, 3, 7, 5, 8, 1, 6, 4, 5, 3, 7, 4, 7, 2, 6, 5, 7, 3, 8, 5, 8, 2, 7, 5, 7, 4, 9, 6, 10, 3, 9, 7, 10, 5, 12, 8, 13, 1]

cp's OEIS Frontend

A120562 Sum of binomial coefficients binomial(i+j, i) modulo 2 over all pairs (i,j) of positive integers satisfying 3i+j=n.

Table of values

List of values

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

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

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