A023868 - cp's OEIS frontend

A023868 a(n) = 1t(n) + 2t(n-1) + ... + k*t(n+1-k), where k=floor((n+1)/2) and t is A023533.

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

[1, 0, 0, 1, 2, 3, 4, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 19, 21, 23, 25, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 32]

cp's OEIS Frontend

A023868 a(n) = 1t(n) + 2t(n-1) + ... + k*t(n+1-k), where k=floor((n+1)/2) and t is A023533.

Table of values

List of values

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

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

cp's OEIS Frontend

A023868 a(n) = 1*t(n) + 2*t(n-1) + ... + k*t(n+1-k), where k=floor((n+1)/2) and t is A023533.

Table of values

List of values

A023868 a(n) = 1t(n) + 2t(n-1) + ... + k*t(n+1-k), where k=floor((n+1)/2) and t is A023533.

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