A156562 - cp's OEIS frontend

A156562 a(n) = (-1)^nSum_{k=1..n} A054353(k)(-1)^k.

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

[1, 2, 3, 3, 4, 5, 5, 7, 7, 8, 9, 10, 10, 11, 12, 12, 13, 14, 15, 15, 17, 16, 18, 18, 19, 20, 21, 21, 22, 23, 23, 24, 25, 25, 27, 27, 28, 29, 30, 30, 31, 32, 32, 34, 34, 35, 36, 36, 37, 38, 38, 39, 40, 41, 41, 43, 43, 44, 44, 46, 45, 48, 47, 49, 49, 51, 50, 52]

cp's OEIS Frontend

A156562 a(n) = (-1)^nSum_{k=1..n} A054353(k)(-1)^k.

Table of values

List of values

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

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

cp's OEIS Frontend

A156562 a(n) = (-1)^n*Sum_{k=1..n} A054353(k)*(-1)^k.

Table of values

List of values

A156562 a(n) = (-1)^nSum_{k=1..n} A054353(k)(-1)^k.

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