A288656 - cp's OEIS frontend

A288656 a(n) = Sum_{k=1..n} Sum_{i=floor((k-1)/2)..k-1} i * c(i), where c is the prime characteristic (A010051).

n	a(n)
0	0
1	0
2	0
3	2
4	7
5	12
6	22
7	30
8	45
9	57
10	69
11	81
12	104
13	122
14	153
15	184
16	215
17	239
18	280
19	321
20	381
21	441
22	501
23	561
24	644
25	716
26	788
27	860
28	932
29	991
30	1079
31	1167
32	1286
33	1405
34	1524
35	1643
36	1762
37	1864
38	2003
39	2142
40	2281
41	2401
42	2562
43	2723
44	2927
45	3131
46	3335
47	3539
48	3790
49	4018
50	4246
51	4474
52	4702
53	4930
54	5211
55	5492
56	5773
57	6054
58	6335
59	6616
60	6956
61	7267
62	7639

[0, 0, 0, 2, 7, 12, 22, 30, 45, 57, 69, 81, 104, 122, 153, 184, 215, 239, 280, 321, 381, 441, 501, 561, 644, 716, 788, 860, 932, 991, 1079, 1167, 1286, 1405, 1524, 1643, 1762, 1864, 2003, 2142, 2281, 2401, 2562, 2723, 2927, 3131, 3335, 3539, 3790, 4018, 4246, 4474, 4702, 4930, 5211, 5492, 5773, 6054, 6335, 6616, 6956, 7267, 7639]

cp's OEIS Frontend

A288656 a(n) = Sum_{k=1..n} Sum_{i=floor((k-1)/2)..k-1} i * c(i), where c is the prime characteristic (A010051).

Table of values

List of values