A191373 - cp's OEIS frontend

A191373 Sum of binomial coefficients C(i+j,i) modulo 2 over all pairs (i,j) of positive integers satisfying 5i+j=n.

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

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

cp's OEIS Frontend

A191373 Sum of binomial coefficients C(i+j,i) modulo 2 over all pairs (i,j) of positive integers satisfying 5i+j=n.

Table of values

List of values

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

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

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