A134660 - cp's OEIS frontend

A134660 Number of odd coefficients in (1 + x + x^2 + x^3)^n.

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

[1, 4, 4, 4, 4, 16, 4, 8, 4, 16, 16, 4, 4, 16, 8, 16, 4, 16, 16, 16, 16, 64, 4, 8, 4, 16, 16, 8, 8, 32, 16, 32, 4, 16, 16, 16, 16, 64, 16, 32, 16, 64, 64, 4, 4, 16, 8, 16, 4, 16, 16, 16, 16, 64, 8, 16, 8, 32, 32, 16, 16, 64, 32, 64, 4, 16, 16, 16, 16, 64, 16, 32, 16, 64, 64, 16, 16, 64]

cp's OEIS Frontend

A134660 Number of odd coefficients in (1 + x + x^2 + x^3)^n.

Table of values

List of values

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

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

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