A025129 - cp's OEIS frontend

A025129 a(n) = p(1)p(n) + p(2)p(n-1) + ... + p(k)p(n-k+1), where k = [ n/2 ], p = A000040, the primes.

n	a(n)
1	0
2	6
3	10
4	29
5	43
6	94
7	128
8	231
9	279
10	484
11	584
12	903
13	1051
14	1552
15	1796
16	2489
17	2823
18	3784
19	4172
20	5515
21	6091
22	7758
23	8404
24	10575
25	11395
26	14076
27	15174
28	18339
29	19667
30	23414
31	24906
32	29437
33	31089
34	36500
35	38614
36	44731
37	47071
38	54198
39	56914
40	65051
41	68371
42	77402
43	81052
44	91341

[0, 6, 10, 29, 43, 94, 128, 231, 279, 484, 584, 903, 1051, 1552, 1796, 2489, 2823, 3784, 4172, 5515, 6091, 7758, 8404, 10575, 11395, 14076, 15174, 18339, 19667, 23414, 24906, 29437, 31089, 36500, 38614, 44731, 47071, 54198, 56914, 65051, 68371, 77402, 81052, 91341]

cp's OEIS Frontend

A025129 a(n) = p(1)p(n) + p(2)p(n-1) + ... + p(k)p(n-k+1), where k = [ n/2 ], p = A000040, the primes.

Table of values

List of values