A092092 - cp's OEIS frontend

A092092 Back and Forth Summant S(n, 3):</span> a(n) <span class="maths">= Sum{i=0..floor(2n/3)} (n-3i).

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

[1, 1, 0, 3, 2, 0, 5, 3, 0, 7, 4, 0, 9, 5, 0, 11, 6, 0, 13, 7, 0, 15, 8, 0, 17, 9, 0, 19, 10, 0, 21, 11, 0, 23, 12, 0, 25, 13, 0, 27, 14, 0, 29, 15, 0, 31, 16, 0, 33, 17, 0, 35, 18, 0, 37, 19, 0, 39, 20, 0, 41, 21, 0, 43, 22, 0, 45, 23, 0, 47, 24, 0, 49, 25, 0, 51, 26, 0, 53, 27, 0, 55, 28]

cp's OEIS Frontend

A092092 Back and Forth Summant S(n, 3):</span> a(n) <span class="maths">= Sum{i=0..floor(2n/3)} (n-3i).

Table of values

List of values

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

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

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