A025070 - cp's OEIS frontend

A025070 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023532, t = (composite numbers).

n	a(n)
1	6
2	8
3	9
4	10
5	21
6	24
7	37
8	42
9	47
10	51
11	69
12	75
13	96
14	102
15	126
16	135
17	142
18	150
19	178
20	187
21	217
22	227
23	259
24	272
25	307
26	319
27	332
28	345
29	385
30	401
31	443
32	457
33	503
34	522
35	568
36	587
37	636
38	656
39	675
40	693
41	747
42	769
43	825
44	847
45	906
46	929
47	991
48	1016
49	1079
50	1105
51	1172
52	1201
53	1230
54	1256
55	1324
56	1354

[6, 8, 9, 10, 21, 24, 37, 42, 47, 51, 69, 75, 96, 102, 126, 135, 142, 150, 178, 187, 217, 227, 259, 272, 307, 319, 332, 345, 385, 401, 443, 457, 503, 522, 568, 587, 636, 656, 675, 693, 747, 769, 825, 847, 906, 929, 991, 1016, 1079, 1105, 1172, 1201, 1230, 1256, 1324, 1354]

cp's OEIS Frontend

A025070 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023532, t = (composite numbers).

Table of values

List of values