A332554 - cp's OEIS frontend

A332554 a(n) = (n*(n+1)/2)/Q(n) - (Q(n)+1)/2, where Q(n) = A332547(n).

n	a(n)
2	2
3	5
4	9
5	3
6	5
7	27
8	10
9	6
10	8
11	20
12	24
13	9
14	11
15	21
16	135
17	12
18	14
19	35
20	6
21	15
22	17
23	90
24	12
25	18
26	20
27	7
28	54
29	21
30	23
31	495
32	42
33	24
34	26
35	19
36	69
37	27
38	29
39	44
40	161
41	30
42	32
43	80
44	13
45	33
46	35
47	374
48	45
49	17
50	38
51	14
52	99
53	39
54	10
55	26
56	65
57	42
58	44
59	110
60	114
61	45
62	47
63	85
64	153
65	11

[2, 5, 9, 3, 5, 27, 10, 6, 8, 20, 24, 9, 11, 21, 135, 12, 14, 35, 6, 15, 17, 90, 12, 18, 20, 7, 54, 21, 23, 495, 42, 24, 26, 19, 69, 27, 29, 44, 161, 30, 32, 80, 13, 33, 35, 374, 45, 17, 38, 14, 99, 39, 10, 26, 65, 42, 44, 110, 114, 45, 47, 85, 153, 11]

cp's OEIS Frontend

A332554 a(n) = (n*(n+1)/2)/Q(n) - (Q(n)+1)/2, where Q(n) = A332547(n).

Table of values

List of values

n	a(n)
2	2
3	5
4	9
5	3
6	5
7	27
8	10
9	6
10	8
11	20
12	24
13	9
14	11
15	21
16	135
17	12
18	14
19	35
20	6
21	15
22	17
23	90
24	12
25	18
26	20
27	7
28	54
29	21
30	23
31	495
32	42
33	24
34	26
35	19
36	69
37	27
38	29
39	44
40	161
41	30
42	32
43	80
44	13
45	33
46	35
47	374
48	45
49	17
50	38
51	14
52	99
53	39
54	10
55	26
56	65
57	42
58	44
59	110
60	114
61	45
62	47
63	85
64	153
65	11

n	a(n)
2	2
3	5
4	9
5	3
6	5
7	27
8	10
9	6
10	8
11	20
12	24
13	9
14	11
15	21
16	135
17	12
18	14
19	35
20	6
21	15
22	17
23	90
24	12
25	18
26	20
27	7
28	54
29	21
30	23
31	495
32	42
33	24
34	26
35	19
36	69
37	27
38	29
39	44
40	161
41	30
42	32
43	80
44	13
45	33
46	35
47	374
48	45
49	17
50	38
51	14
52	99
53	39
54	10
55	26
56	65
57	42
58	44
59	110
60	114
61	45
62	47
63	85
64	153
65	11

n	a(n)
2	2
3	5
4	9
5	3
6	5
7	27
8	10
9	6
10	8
11	20
12	24
13	9
14	11
15	21
16	135
17	12
18	14
19	35
20	6
21	15
22	17
23	90
24	12
25	18
26	20
27	7
28	54
29	21
30	23
31	495
32	42
33	24
34	26
35	19
36	69
37	27
38	29
39	44
40	161
41	30
42	32
43	80
44	13
45	33
46	35
47	374
48	45
49	17
50	38
51	14
52	99
53	39
54	10
55	26
56	65
57	42
58	44
59	110
60	114
61	45
62	47
63	85
64	153
65	11