A336408 - cp's OEIS frontend

A336408 a(n) = number of composites c+d such that c is a composite and d is the n-th odd composite.

n	a(n)
1	1
2	4
3	7
4	8
5	10
6	13
7	15
8	17
9	20
10	22
11	24
12	24
13	26
14	31
15	33
16	35
17	38
18	40
19	43
20	44
21	46
22	47
23	49
24	52
25	53
26	58
27	63
28	63
29	64
30	66
31	66
32	68
33	71
34	73
35	75
36	77
37	79
38	80
39	82
40	84
41	89
42	91
43	91
44	94
45	98
46	99
47	102
48	103
49	105
50	109
51	110
52	111
53	114
54	117
55	120
56	122
57	123
58	125
59	128
60	129
61	131
62	131

[1, 4, 7, 8, 10, 13, 15, 17, 20, 22, 24, 24, 26, 31, 33, 35, 38, 40, 43, 44, 46, 47, 49, 52, 53, 58, 63, 63, 64, 66, 66, 68, 71, 73, 75, 77, 79, 80, 82, 84, 89, 91, 91, 94, 98, 99, 102, 103, 105, 109, 110, 111, 114, 117, 120, 122, 123, 125, 128, 129, 131, 131]

cp's OEIS Frontend

A336408 a(n) = number of composites c+d such that c is a composite and d is the n-th odd composite.

Table of values

List of values

n	a(n)
1	1
2	4
3	7
4	8
5	10
6	13
7	15
8	17
9	20
10	22
11	24
12	24
13	26
14	31
15	33
16	35
17	38
18	40
19	43
20	44
21	46
22	47
23	49
24	52
25	53
26	58
27	63
28	63
29	64
30	66
31	66
32	68
33	71
34	73
35	75
36	77
37	79
38	80
39	82
40	84
41	89
42	91
43	91
44	94
45	98
46	99
47	102
48	103
49	105
50	109
51	110
52	111
53	114
54	117
55	120
56	122
57	123
58	125
59	128
60	129
61	131
62	131

n	a(n)
1	1
2	4
3	7
4	8
5	10
6	13
7	15
8	17
9	20
10	22
11	24
12	24
13	26
14	31
15	33
16	35
17	38
18	40
19	43
20	44
21	46
22	47
23	49
24	52
25	53
26	58
27	63
28	63
29	64
30	66
31	66
32	68
33	71
34	73
35	75
36	77
37	79
38	80
39	82
40	84
41	89
42	91
43	91
44	94
45	98
46	99
47	102
48	103
49	105
50	109
51	110
52	111
53	114
54	117
55	120
56	122
57	123
58	125
59	128
60	129
61	131
62	131

n	a(n)
1	1
2	4
3	7
4	8
5	10
6	13
7	15
8	17
9	20
10	22
11	24
12	24
13	26
14	31
15	33
16	35
17	38
18	40
19	43
20	44
21	46
22	47
23	49
24	52
25	53
26	58
27	63
28	63
29	64
30	66
31	66
32	68
33	71
34	73
35	75
36	77
37	79
38	80
39	82
40	84
41	89
42	91
43	91
44	94
45	98
46	99
47	102
48	103
49	105
50	109
51	110
52	111
53	114
54	117
55	120
56	122
57	123
58	125
59	128
60	129
61	131
62	131