A156563 - cp's OEIS frontend

A156563 a(n) = (-1)^nSum_{k=1..n} A078649(k)(-1)^k.

n	a(n)
1	2
2	2
3	6
4	5
5	8
6	8
7	10
8	12
9	14
10	14
11	17
12	18
13	20
14	20
15	24
16	24
17	27
18	26
19	30
20	28
21	34
22	31
23	36
24	34
25	40
26	38
27	42
28	41
29	44
30	45
31	47
32	47
33	50
34	49
35	54
36	53
37	57
38	55
39	60
40	59
41	62
42	62
43	64
44	66
45	67
46	68
47	70
48	70
49	74
50	74
51	76
52	77
53	80
54	80
55	82
56	83
57	84
58	87
59	88
60	90
61	90
62	94
63	94
64	96
65	97
66	100
67	101

[2, 2, 6, 5, 8, 8, 10, 12, 14, 14, 17, 18, 20, 20, 24, 24, 27, 26, 30, 28, 34, 31, 36, 34, 40, 38, 42, 41, 44, 45, 47, 47, 50, 49, 54, 53, 57, 55, 60, 59, 62, 62, 64, 66, 67, 68, 70, 70, 74, 74, 76, 77, 80, 80, 82, 83, 84, 87, 88, 90, 90, 94, 94, 96, 97, 100, 101]

cp's OEIS Frontend

A156563 a(n) = (-1)^nSum_{k=1..n} A078649(k)(-1)^k.

Table of values

List of values

n	a(n)
1	2
2	2
3	6
4	5
5	8
6	8
7	10
8	12
9	14
10	14
11	17
12	18
13	20
14	20
15	24
16	24
17	27
18	26
19	30
20	28
21	34
22	31
23	36
24	34
25	40
26	38
27	42
28	41
29	44
30	45
31	47
32	47
33	50
34	49
35	54
36	53
37	57
38	55
39	60
40	59
41	62
42	62
43	64
44	66
45	67
46	68
47	70
48	70
49	74
50	74
51	76
52	77
53	80
54	80
55	82
56	83
57	84
58	87
59	88
60	90
61	90
62	94
63	94
64	96
65	97
66	100
67	101

n	a(n)
1	2
2	2
3	6
4	5
5	8
6	8
7	10
8	12
9	14
10	14
11	17
12	18
13	20
14	20
15	24
16	24
17	27
18	26
19	30
20	28
21	34
22	31
23	36
24	34
25	40
26	38
27	42
28	41
29	44
30	45
31	47
32	47
33	50
34	49
35	54
36	53
37	57
38	55
39	60
40	59
41	62
42	62
43	64
44	66
45	67
46	68
47	70
48	70
49	74
50	74
51	76
52	77
53	80
54	80
55	82
56	83
57	84
58	87
59	88
60	90
61	90
62	94
63	94
64	96
65	97
66	100
67	101

cp's OEIS Frontend

A156563 a(n) = (-1)^n*Sum_{k=1..n} A078649(k)*(-1)^k.

Table of values

List of values

A156563 a(n) = (-1)^nSum_{k=1..n} A078649(k)(-1)^k.

n	a(n)
1	2
2	2
3	6
4	5
5	8
6	8
7	10
8	12
9	14
10	14
11	17
12	18
13	20
14	20
15	24
16	24
17	27
18	26
19	30
20	28
21	34
22	31
23	36
24	34
25	40
26	38
27	42
28	41
29	44
30	45
31	47
32	47
33	50
34	49
35	54
36	53
37	57
38	55
39	60
40	59
41	62
42	62
43	64
44	66
45	67
46	68
47	70
48	70
49	74
50	74
51	76
52	77
53	80
54	80
55	82
56	83
57	84
58	87
59	88
60	90
61	90
62	94
63	94
64	96
65	97
66	100
67	101