A339370 - cp's OEIS frontend

A339370 a(n) = Sum_{k=1..floor(n/2)} (n-k) * floor((n-k)/k).

n	a(n)
1	0
2	1
3	4
4	11
5	19
6	36
7	50
8	76
9	102
10	138
11	165
12	227
13	262
14	318
15	381
16	460
17	510
18	614
19	672
20	791
21	889
22	990
23	1064
24	1249
25	1353
26	1477
27	1610
28	1790
29	1891
30	2133
31	2244
32	2455
33	2626
34	2798
35	2983
36	3312
37	3452
38	3649
39	3857
40	4198
41	4356
42	4715
43	4883
44	5190
45	5514
46	5763
47	5949
48	6446
49	6686
50	7045

[0, 1, 4, 11, 19, 36, 50, 76, 102, 138, 165, 227, 262, 318, 381, 460, 510, 614, 672, 791, 889, 990, 1064, 1249, 1353, 1477, 1610, 1790, 1891, 2133, 2244, 2455, 2626, 2798, 2983, 3312, 3452, 3649, 3857, 4198, 4356, 4715, 4883, 5190, 5514, 5763, 5949, 6446, 6686, 7045]

cp's OEIS Frontend

A339370 a(n) = Sum_{k=1..floor(n/2)} (n-k) * floor((n-k)/k).

Table of values

List of values