A071532 - cp's OEIS frontend

A071532 a(n) = (-1) * Sum_{k=1..n} (-1)^floor((3/2)^k).

n	a(n)
1	1
2	0
3	1
4	2
5	3
6	4
7	5
8	6
9	5
10	6
11	5
12	6
13	5
14	6
15	7
16	6
17	7
18	8
19	7
20	8
21	9
22	10
23	9
24	8
25	9
26	8
27	9
28	8
29	7
30	8
31	7
32	8
33	9
34	10
35	11
36	10
37	9
38	10
39	9
40	8
41	7
42	8
43	7
44	6
45	7
46	8
47	7
48	8
49	7
50	6
51	5
52	6
53	7
54	6
55	7
56	6
57	7
58	8
59	9
60	8
61	9
62	10
63	11
64	12
65	13
66	12
67	11
68	10
69	11
70	10
71	11
72	10
73	9
74	10
75	9
76	10
77	9
78	8
79	7
80	6
81	5
82	6
83	7
84	6
85	7
86	6
87	5
88	4
89	5
90	6
91	5
92	4
93	5
94	4
95	3

[1, 0, 1, 2, 3, 4, 5, 6, 5, 6, 5, 6, 5, 6, 7, 6, 7, 8, 7, 8, 9, 10, 9, 8, 9, 8, 9, 8, 7, 8, 7, 8, 9, 10, 11, 10, 9, 10, 9, 8, 7, 8, 7, 6, 7, 8, 7, 8, 7, 6, 5, 6, 7, 6, 7, 6, 7, 8, 9, 8, 9, 10, 11, 12, 13, 12, 11, 10, 11, 10, 11, 10, 9, 10, 9, 10, 9, 8, 7, 6, 5, 6, 7, 6, 7, 6, 5, 4, 5, 6, 5, 4, 5, 4, 3]

cp's OEIS Frontend

A071532 a(n) = (-1) * Sum_{k=1..n} (-1)^floor((3/2)^k).

Table of values

List of values

n	a(n)
1	1
2	0
3	1
4	2
5	3
6	4
7	5
8	6
9	5
10	6
11	5
12	6
13	5
14	6
15	7
16	6
17	7
18	8
19	7
20	8
21	9
22	10
23	9
24	8
25	9
26	8
27	9
28	8
29	7
30	8
31	7
32	8
33	9
34	10
35	11
36	10
37	9
38	10
39	9
40	8
41	7
42	8
43	7
44	6
45	7
46	8
47	7
48	8
49	7
50	6
51	5
52	6
53	7
54	6
55	7
56	6
57	7
58	8
59	9
60	8
61	9
62	10
63	11
64	12
65	13
66	12
67	11
68	10
69	11
70	10
71	11
72	10
73	9
74	10
75	9
76	10
77	9
78	8
79	7
80	6
81	5
82	6
83	7
84	6
85	7
86	6
87	5
88	4
89	5
90	6
91	5
92	4
93	5
94	4
95	3

n	a(n)
1	1
2	0
3	1
4	2
5	3
6	4
7	5
8	6
9	5
10	6
11	5
12	6
13	5
14	6
15	7
16	6
17	7
18	8
19	7
20	8
21	9
22	10
23	9
24	8
25	9
26	8
27	9
28	8
29	7
30	8
31	7
32	8
33	9
34	10
35	11
36	10
37	9
38	10
39	9
40	8
41	7
42	8
43	7
44	6
45	7
46	8
47	7
48	8
49	7
50	6
51	5
52	6
53	7
54	6
55	7
56	6
57	7
58	8
59	9
60	8
61	9
62	10
63	11
64	12
65	13
66	12
67	11
68	10
69	11
70	10
71	11
72	10
73	9
74	10
75	9
76	10
77	9
78	8
79	7
80	6
81	5
82	6
83	7
84	6
85	7
86	6
87	5
88	4
89	5
90	6
91	5
92	4
93	5
94	4
95	3

n	a(n)
1	1
2	0
3	1
4	2
5	3
6	4
7	5
8	6
9	5
10	6
11	5
12	6
13	5
14	6
15	7
16	6
17	7
18	8
19	7
20	8
21	9
22	10
23	9
24	8
25	9
26	8
27	9
28	8
29	7
30	8
31	7
32	8
33	9
34	10
35	11
36	10
37	9
38	10
39	9
40	8
41	7
42	8
43	7
44	6
45	7
46	8
47	7
48	8
49	7
50	6
51	5
52	6
53	7
54	6
55	7
56	6
57	7
58	8
59	9
60	8
61	9
62	10
63	11
64	12
65	13
66	12
67	11
68	10
69	11
70	10
71	11
72	10
73	9
74	10
75	9
76	10
77	9
78	8
79	7
80	6
81	5
82	6
83	7
84	6
85	7
86	6
87	5
88	4
89	5
90	6
91	5
92	4
93	5
94	4
95	3