A071622 - cp's OEIS frontend

A071622 a(n) = (-1)*Sum_{k=1..n} (-1)^floor((4/3)^k).

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

[1, 2, 1, 2, 1, 2, 3, 4, 5, 6, 7, 8, 7, 6, 5, 6, 7, 8, 7, 8, 7, 6, 7, 6, 5, 6, 5, 6, 7, 8, 7, 6, 7, 8, 7, 6, 5, 6, 7, 8, 9, 10, 11, 12, 11, 10, 9, 10, 11, 10, 9, 8, 7, 8, 7, 8, 7, 8, 9, 10, 9, 8, 9, 8, 9, 8, 7, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 14, 15, 14, 13, 12, 13, 12, 13, 12, 11, 10, 9, 10, 9]

cp's OEIS Frontend

A071622 a(n) = (-1)*Sum_{k=1..n} (-1)^floor((4/3)^k).

Table of values

List of values

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

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

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