A069627 - cp's OEIS frontend

A069627 Sum_{k=1..n} floor(n(n-1)/(2k)).

n	a(n)
0	0
1	0
2	1
3	5
4	12
5	22
6	35
7	53
8	74
9	101
10	129
11	162
12	202
13	244
14	292
15	344
16	403
17	463
18	527
19	601
20	676
21	762
22	844
23	937
24	1035
25	1138
26	1245
27	1355
28	1476
29	1597
30	1726
31	1862
32	2002
33	2149
34	2300
35	2454
36	2621
37	2784
38	2957
39	3136
40	3323
41	3515
42	3707
43	3914
44	4119
45	4338
46	4551
47	4782
48	5012
49	5250

[0, 0, 1, 5, 12, 22, 35, 53, 74, 101, 129, 162, 202, 244, 292, 344, 403, 463, 527, 601, 676, 762, 844, 937, 1035, 1138, 1245, 1355, 1476, 1597, 1726, 1862, 2002, 2149, 2300, 2454, 2621, 2784, 2957, 3136, 3323, 3515, 3707, 3914, 4119, 4338, 4551, 4782, 5012, 5250]

cp's OEIS Frontend

A069627 Sum_{k=1..n} floor(n(n-1)/(2k)).

Table of values

List of values

cp's OEIS Frontend

A069627 Sum_{k=1..n} floor(n*(n-1)/(2*k)).

Table of values

List of values

A069627 Sum_{k=1..n} floor(n(n-1)/(2k)).