A024321 - cp's OEIS frontend

A024321 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)*t(n+1-k), where k = floor((n+1)/2), s = A023531, t = (composite numbers).

n	a(n)
1	0
2	0
3	6
4	8
5	9
6	10
7	12
8	14
9	25
10	28
11	32
12	35
13	37
14	40
15	44
16	46
17	64
18	69
19	73
20	77
21	81
22	85
23	89
24	93
25	96
26	100
27	128
28	133
29	139
30	144
31	148
32	154
33	162
34	166
35	170
36	176
37	181
38	187
39	223
40	229
41	236
42	242
43	248
44	255
45	262
46	268
47	275
48	281
49	287
50	294
51	301
52	308
53	354
54	361
55	370
56	380
57	386
58	394
59	401
60	408
61	418
62	425

[0, 0, 6, 8, 9, 10, 12, 14, 25, 28, 32, 35, 37, 40, 44, 46, 64, 69, 73, 77, 81, 85, 89, 93, 96, 100, 128, 133, 139, 144, 148, 154, 162, 166, 170, 176, 181, 187, 223, 229, 236, 242, 248, 255, 262, 268, 275, 281, 287, 294, 301, 308, 354, 361, 370, 380, 386, 394, 401, 408, 418, 425]

cp's OEIS Frontend

A024321 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)*t(n+1-k), where k = floor((n+1)/2), s = A023531, t = (composite numbers).

Table of values

List of values

n	a(n)
1	0
2	0
3	6
4	8
5	9
6	10
7	12
8	14
9	25
10	28
11	32
12	35
13	37
14	40
15	44
16	46
17	64
18	69
19	73
20	77
21	81
22	85
23	89
24	93
25	96
26	100
27	128
28	133
29	139
30	144
31	148
32	154
33	162
34	166
35	170
36	176
37	181
38	187
39	223
40	229
41	236
42	242
43	248
44	255
45	262
46	268
47	275
48	281
49	287
50	294
51	301
52	308
53	354
54	361
55	370
56	380
57	386
58	394
59	401
60	408
61	418
62	425

n	a(n)
1	0
2	0
3	6
4	8
5	9
6	10
7	12
8	14
9	25
10	28
11	32
12	35
13	37
14	40
15	44
16	46
17	64
18	69
19	73
20	77
21	81
22	85
23	89
24	93
25	96
26	100
27	128
28	133
29	139
30	144
31	148
32	154
33	162
34	166
35	170
36	176
37	181
38	187
39	223
40	229
41	236
42	242
43	248
44	255
45	262
46	268
47	275
48	281
49	287
50	294
51	301
52	308
53	354
54	361
55	370
56	380
57	386
58	394
59	401
60	408
61	418
62	425

cp's OEIS Frontend

A024321 a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n+1-k), where k = floor((n+1)/2), s = A023531, t = (composite numbers).

Table of values

List of values

A024321 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)*t(n+1-k), where k = floor((n+1)/2), s = A023531, t = (composite numbers).

n	a(n)
1	0
2	0
3	6
4	8
5	9
6	10
7	12
8	14
9	25
10	28
11	32
12	35
13	37
14	40
15	44
16	46
17	64
18	69
19	73
20	77
21	81
22	85
23	89
24	93
25	96
26	100
27	128
28	133
29	139
30	144
31	148
32	154
33	162
34	166
35	170
36	176
37	181
38	187
39	223
40	229
41	236
42	242
43	248
44	255
45	262
46	268
47	275
48	281
49	287
50	294
51	301
52	308
53	354
54	361
55	370
56	380
57	386
58	394
59	401
60	408
61	418
62	425