A376648 - cp's OEIS frontend

A376648 a(n) = Sum_{k=0..floor(n/4)} binomial(floor(k/2),n-4*k).

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	0
6	0
7	0
8	1
9	1
10	0
11	0
12	1
13	1
14	0
15	0
16	1
17	2
18	1
19	0
20	1
21	2
22	1
23	0
24	1
25	3
26	3
27	1
28	1
29	3
30	3
31	1
32	1
33	4
34	6
35	4
36	2
37	4
38	6
39	4
40	2
41	5
42	10
43	10
44	6
45	6
46	10
47	10
48	6
49	7
50	15
51	20
52	16
53	12
54	16
55	20
56	16
57	13
58	22
59	35
60	36
61	28
62	28
63	36
64	36
65	29
66	35
67	57
68	71
69	64
70	56
71	64
72	72
73	65
74	64
75	92
76	128
77	135

[1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 3, 3, 1, 1, 3, 3, 1, 1, 4, 6, 4, 2, 4, 6, 4, 2, 5, 10, 10, 6, 6, 10, 10, 6, 7, 15, 20, 16, 12, 16, 20, 16, 13, 22, 35, 36, 28, 28, 36, 36, 29, 35, 57, 71, 64, 56, 64, 72, 65, 64, 92, 128, 135]

cp's OEIS Frontend

A376648 a(n) = Sum_{k=0..floor(n/4)} binomial(floor(k/2),n-4*k).

Table of values

List of values

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	0
6	0
7	0
8	1
9	1
10	0
11	0
12	1
13	1
14	0
15	0
16	1
17	2
18	1
19	0
20	1
21	2
22	1
23	0
24	1
25	3
26	3
27	1
28	1
29	3
30	3
31	1
32	1
33	4
34	6
35	4
36	2
37	4
38	6
39	4
40	2
41	5
42	10
43	10
44	6
45	6
46	10
47	10
48	6
49	7
50	15
51	20
52	16
53	12
54	16
55	20
56	16
57	13
58	22
59	35
60	36
61	28
62	28
63	36
64	36
65	29
66	35
67	57
68	71
69	64
70	56
71	64
72	72
73	65
74	64
75	92
76	128
77	135

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	0
6	0
7	0
8	1
9	1
10	0
11	0
12	1
13	1
14	0
15	0
16	1
17	2
18	1
19	0
20	1
21	2
22	1
23	0
24	1
25	3
26	3
27	1
28	1
29	3
30	3
31	1
32	1
33	4
34	6
35	4
36	2
37	4
38	6
39	4
40	2
41	5
42	10
43	10
44	6
45	6
46	10
47	10
48	6
49	7
50	15
51	20
52	16
53	12
54	16
55	20
56	16
57	13
58	22
59	35
60	36
61	28
62	28
63	36
64	36
65	29
66	35
67	57
68	71
69	64
70	56
71	64
72	72
73	65
74	64
75	92
76	128
77	135

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	0
6	0
7	0
8	1
9	1
10	0
11	0
12	1
13	1
14	0
15	0
16	1
17	2
18	1
19	0
20	1
21	2
22	1
23	0
24	1
25	3
26	3
27	1
28	1
29	3
30	3
31	1
32	1
33	4
34	6
35	4
36	2
37	4
38	6
39	4
40	2
41	5
42	10
43	10
44	6
45	6
46	10
47	10
48	6
49	7
50	15
51	20
52	16
53	12
54	16
55	20
56	16
57	13
58	22
59	35
60	36
61	28
62	28
63	36
64	36
65	29
66	35
67	57
68	71
69	64
70	56
71	64
72	72
73	65
74	64
75	92
76	128
77	135