A024370 - cp's OEIS frontend

A024370 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = (composite numbers).

n	a(n)
1	4
2	6
3	8
4	9
5	18
6	21
7	33
8	37
9	42
10	47
11	63
12	69
13	89
14	96
15	117
16	126
17	135
18	142
19	168
20	178
21	207
22	217
23	248
24	259
25	294
26	307
27	319
28	332
29	370
30	385
31	427
32	443
33	484
34	503
35	550
36	568
37	617
38	636
39	656
40	675
41	726
42	747
43	803
44	825
45	882
46	906
47	965
48	991
49	1054
50	1079
51	1144
52	1172
53	1201
54	1230
55	1298
56	1324

[4, 6, 8, 9, 18, 21, 33, 37, 42, 47, 63, 69, 89, 96, 117, 126, 135, 142, 168, 178, 207, 217, 248, 259, 294, 307, 319, 332, 370, 385, 427, 443, 484, 503, 550, 568, 617, 636, 656, 675, 726, 747, 803, 825, 882, 906, 965, 991, 1054, 1079, 1144, 1172, 1201, 1230, 1298, 1324]

cp's OEIS Frontend

A024370 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = (composite numbers).

Table of values

List of values