A384715 - cp's OEIS frontend

A384715 a(n) = Sum_{k=0..n} (binomial(n, k) mod 4).

n	a(n)
0	1
1	2
2	4
3	8
4	4
5	8
6	12
7	16
8	4
9	8
10	12
11	24
12	12
13	24
14	24
15	32
16	4
17	8
18	12
19	24
20	12
21	24
22	32
23	48
24	12
25	24
26	32
27	48
28	24
29	48
30	48
31	64
32	4
33	8
34	12
35	24
36	12
37	24
38	32
39	48
40	12
41	24
42	32
43	64
44	32
45	64
46	64
47	96
48	12
49	24
50	32
51	48
52	32
53	64
54	64
55	96
56	24
57	48
58	64
59	96
60	48
61	96
62	96
63	128
64	4
65	8
66	12
67	24

[1, 2, 4, 8, 4, 8, 12, 16, 4, 8, 12, 24, 12, 24, 24, 32, 4, 8, 12, 24, 12, 24, 32, 48, 12, 24, 32, 48, 24, 48, 48, 64, 4, 8, 12, 24, 12, 24, 32, 48, 12, 24, 32, 64, 32, 64, 64, 96, 12, 24, 32, 48, 32, 64, 64, 96, 24, 48, 64, 96, 48, 96, 96, 128, 4, 8, 12, 24]

cp's OEIS Frontend

A384715 a(n) = Sum_{k=0..n} (binomial(n, k) mod 4).

Table of values

List of values

n	a(n)
0	1
1	2
2	4
3	8
4	4
5	8
6	12
7	16
8	4
9	8
10	12
11	24
12	12
13	24
14	24
15	32
16	4
17	8
18	12
19	24
20	12
21	24
22	32
23	48
24	12
25	24
26	32
27	48
28	24
29	48
30	48
31	64
32	4
33	8
34	12
35	24
36	12
37	24
38	32
39	48
40	12
41	24
42	32
43	64
44	32
45	64
46	64
47	96
48	12
49	24
50	32
51	48
52	32
53	64
54	64
55	96
56	24
57	48
58	64
59	96
60	48
61	96
62	96
63	128
64	4
65	8
66	12
67	24

n	a(n)
0	1
1	2
2	4
3	8
4	4
5	8
6	12
7	16
8	4
9	8
10	12
11	24
12	12
13	24
14	24
15	32
16	4
17	8
18	12
19	24
20	12
21	24
22	32
23	48
24	12
25	24
26	32
27	48
28	24
29	48
30	48
31	64
32	4
33	8
34	12
35	24
36	12
37	24
38	32
39	48
40	12
41	24
42	32
43	64
44	32
45	64
46	64
47	96
48	12
49	24
50	32
51	48
52	32
53	64
54	64
55	96
56	24
57	48
58	64
59	96
60	48
61	96
62	96
63	128
64	4
65	8
66	12
67	24

n	a(n)
0	1
1	2
2	4
3	8
4	4
5	8
6	12
7	16
8	4
9	8
10	12
11	24
12	12
13	24
14	24
15	32
16	4
17	8
18	12
19	24
20	12
21	24
22	32
23	48
24	12
25	24
26	32
27	48
28	24
29	48
30	48
31	64
32	4
33	8
34	12
35	24
36	12
37	24
38	32
39	48
40	12
41	24
42	32
43	64
44	32
45	64
46	64
47	96
48	12
49	24
50	32
51	48
52	32
53	64
54	64
55	96
56	24
57	48
58	64
59	96
60	48
61	96
62	96
63	128
64	4
65	8
66	12
67	24